Finding the Fourth Proportional to 11,061.18, 15,279.91 and 7,702.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,061.18 : 15,279.91 = 7,702.31 : x
2. Step 2: Convert to fraction form
   11,061.18/15,279.91 = 7,702.31/x
3. Step 3: Cross multiply
   11,061.18x = 15,279.91 × 7,702.31
4. Step 4: Simplify right side
   11,061.18x = 117,690,622.54
5. Step 5: Solve for x
   x = 117,690,622.54/11,061.18
6. Step 6: Final answer
   x = 10,639.97