Finding the Fourth Proportional to 12,031.31, 16,592.40 and 7,777.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.31 : 16,592.40 = 7,777.89 : x
2. Step 2: Convert to fraction form
   12,031.31/16,592.40 = 7,777.89/x
3. Step 3: Cross multiply
   12,031.31x = 16,592.40 × 7,777.89
4. Step 4: Simplify right side
   12,031.31x = 129,053,862.04
5. Step 5: Solve for x
   x = 129,053,862.04/12,031.31
6. Step 6: Final answer
   x = 10,726.50