Finding the Fourth Proportional to 10,686.24, 14,746.32 and 6,210.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.24 : 14,746.32 = 6,210.72 : x
2. Step 2: Convert to fraction form
   10,686.24/14,746.32 = 6,210.72/x
3. Step 3: Cross multiply
   10,686.24x = 14,746.32 × 6,210.72
4. Step 4: Simplify right side
   10,686.24x = 91,585,264.55
5. Step 5: Solve for x
   x = 91,585,264.55/10,686.24
6. Step 6: Final answer
   x = 8,570.39