Finding the Fourth Proportional to 10,862.15, 15,002.10 and 7,319.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,862.15 : 15,002.10 = 7,319.21 : x
2. Step 2: Convert to fraction form
   10,862.15/15,002.10 = 7,319.21/x
3. Step 3: Cross multiply
   10,862.15x = 15,002.10 × 7,319.21
4. Step 4: Simplify right side
   10,862.15x = 109,803,445.33
5. Step 5: Solve for x
   x = 109,803,445.33/10,862.15
6. Step 6: Final answer
   x = 10,108.82