Finding the Fourth Proportional to 8,043.90, 12,071.25 and 5,124.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,043.90 : 12,071.25 = 5,124.30 : x
2. Step 2: Convert to fraction form
   8,043.90/12,071.25 = 5,124.30/x
3. Step 3: Cross multiply
   8,043.90x = 12,071.25 × 5,124.30
4. Step 4: Simplify right side
   8,043.90x = 61,856,706.38
5. Step 5: Solve for x
   x = 61,856,706.38/8,043.90
6. Step 6: Final answer
   x = 7,689.89