Finding the Fourth Proportional to 12,158.31, 16,779.98 and 7,124.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158.31 : 16,779.98 = 7,124.45 : x
2. Step 2: Convert to fraction form
   12,158.31/16,779.98 = 7,124.45/x
3. Step 3: Cross multiply
   12,158.31x = 16,779.98 × 7,124.45
4. Step 4: Simplify right side
   12,158.31x = 119,548,092.89
5. Step 5: Solve for x
   x = 119,548,092.89/12,158.31
6. Step 6: Final answer
   x = 9,832.62