Finding the Fourth Proportional to 1,210,019.74, 1,669,800.96 and 666,134.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210,019.74 : 1,669,800.96 = 666,134.71 : x
2. Step 2: Convert to fraction form
   1,210,019.74/1,669,800.96 = 666,134.71/x
3. Step 3: Cross multiply
   1,210,019.74x = 1,669,800.96 × 666,134.71
4. Step 4: Simplify right side
   1,210,019.74x = 1,112,312,374,072.82
5. Step 5: Solve for x
   x = 1,112,312,374,072.82/1,210,019.74
6. Step 6: Final answer
   x = 919,251.43