Finding the Fourth Proportional to 2,139,397,997.51, 2,951,927,128.33 and 1,235,138,262.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,397,997.51 : 2,951,927,128.33 = 1,235,138,262.68 : x
2. Step 2: Convert to fraction form
   2,139,397,997.51/2,951,927,128.33 = 1,235,138,262.68/x
3. Step 3: Cross multiply
   2,139,397,997.51x = 2,951,927,128.33 × 1,235,138,262.68
4. Step 4: Simplify right side
   2,139,397,997.51x = 3,646,038,144,847,769,088
5. Step 5: Solve for x
   x = 3,646,038,144,847,769,088/2,139,397,997.51
6. Step 6: Final answer
   x = 1,704,235,560.23