Finding the Fourth Proportional to 22,861.10, 31,547.59 and 12,789.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,861.10 : 31,547.59 = 12,789.71 : x
2. Step 2: Convert to fraction form
   22,861.10/31,547.59 = 12,789.71/x
3. Step 3: Cross multiply
   22,861.10x = 31,547.59 × 12,789.71
4. Step 4: Simplify right side
   22,861.10x = 403,484,574.19
5. Step 5: Solve for x
   x = 403,484,574.19/22,861.10
6. Step 6: Final answer
   x = 17,649.40