Finding the Fourth Proportional to 13,018.52, 17,963.16 and 7,715

Step by Step Solution

1. Step 1: Write the proportion equation
   13,018.52 : 17,963.16 = 7,715 : x
2. Step 2: Convert to fraction form
   13,018.52/17,963.16 = 7,715/x
3. Step 3: Cross multiply
   13,018.52x = 17,963.16 × 7,715
4. Step 4: Simplify right side
   13,018.52x = 138,585,779.40
5. Step 5: Solve for x
   x = 138,585,779.40/13,018.52
6. Step 6: Final answer
   x = 10,645.28