Finding the Fourth Proportional to 10,065.30, 15,114.15 and 7,311.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,065.30 : 15,114.15 = 7,311.30 : x
2. Step 2: Convert to fraction form
   10,065.30/15,114.15 = 7,311.30/x
3. Step 3: Cross multiply
   10,065.30x = 15,114.15 × 7,311.30
4. Step 4: Simplify right side
   10,065.30x = 110,504,084.90
5. Step 5: Solve for x
   x = 110,504,084.90/10,065.30
6. Step 6: Final answer
   x = 10,978.72