Finding the Fourth Proportional to 8,060.72, 12,088.78 and 3,129.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,060.72 : 12,088.78 = 3,129.30 : x
2. Step 2: Convert to fraction form
   8,060.72/12,088.78 = 3,129.30/x
3. Step 3: Cross multiply
   8,060.72x = 12,088.78 × 3,129.30
4. Step 4: Simplify right side
   8,060.72x = 37,829,411.43
5. Step 5: Solve for x
   x = 37,829,411.43/8,060.72
6. Step 6: Final answer
   x = 4,693.06