Finding the Fourth Proportional to 22,605,686.96, 31,194,898.88 and 12,816,789.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,605,686.96 : 31,194,898.88 = 12,816,789.72 : x
2. Step 2: Convert to fraction form
   22,605,686.96/31,194,898.88 = 12,816,789.72/x
3. Step 3: Cross multiply
   22,605,686.96x = 31,194,898.88 × 12,816,789.72
4. Step 4: Simplify right side
   22,605,686.96x = 399,818,459,281,623.50
5. Step 5: Solve for x
   x = 399,818,459,281,623.50/22,605,686.96
6. Step 6: Final answer
   x = 17,686,631.69