Finding the Fourth Proportional to 10,158.34, 15,200.57 and 8,386.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,158.34 : 15,200.57 = 8,386.87 : x
2. Step 2: Convert to fraction form
   10,158.34/15,200.57 = 8,386.87/x
3. Step 3: Cross multiply
   10,158.34x = 15,200.57 × 8,386.87
4. Step 4: Simplify right side
   10,158.34x = 127,485,204.52
5. Step 5: Solve for x
   x = 127,485,204.52/10,158.34
6. Step 6: Final answer
   x = 12,549.81