Finding the Fourth Proportional to 22,661,359.20, 31,271,697.81 and 12,871,772.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,661,359.20 : 31,271,697.81 = 12,871,772.91 : x
2. Step 2: Convert to fraction form
   22,661,359.20/31,271,697.81 = 12,871,772.91/x
3. Step 3: Cross multiply
   22,661,359.20x = 31,271,697.81 × 12,871,772.91
4. Step 4: Simplify right side
   22,661,359.20x = 402,522,192,720,464.31
5. Step 5: Solve for x
   x = 402,522,192,720,464.31/22,661,359.20
6. Step 6: Final answer
   x = 17,762,491.17