Finding the Fourth Proportional to 12,913,138.72, 17,820,937.36 and 7,111,918.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,913,138.72 : 17,820,937.36 = 7,111,918.94 : x
2. Step 2: Convert to fraction form
   12,913,138.72/17,820,937.36 = 7,111,918.94/x
3. Step 3: Cross multiply
   12,913,138.72x = 17,820,937.36 × 7,111,918.94
4. Step 4: Simplify right side
   12,913,138.72x = 126,741,061,939,137.59
5. Step 5: Solve for x
   x = 126,741,061,939,137.59/12,913,138.72
6. Step 6: Final answer
   x = 9,814,892.00