Finding the Fourth Proportional to 8,907.50, 12,294.70 and 5,131.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,907.50 : 12,294.70 = 5,131.10 : x
2. Step 2: Convert to fraction form
   8,907.50/12,294.70 = 5,131.10/x
3. Step 3: Cross multiply
   8,907.50x = 12,294.70 × 5,131.10
4. Step 4: Simplify right side
   8,907.50x = 63,085,335.17
5. Step 5: Solve for x
   x = 63,085,335.17/8,907.50
6. Step 6: Final answer
   x = 7,082.27