Finding the Fourth Proportional to 10,861.02, 14,988.42 and 7,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,861.02 : 14,988.42 = 7,086.60 : x
2. Step 2: Convert to fraction form
   10,861.02/14,988.42 = 7,086.60/x
3. Step 3: Cross multiply
   10,861.02x = 14,988.42 × 7,086.60
4. Step 4: Simplify right side
   10,861.02x = 106,216,937.17
5. Step 5: Solve for x
   x = 106,216,937.17/10,861.02
6. Step 6: Final answer
   x = 9,779.65