Finding the Fourth Proportional to 10,620.72, 14,656.32 and 6,141.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,620.72 : 14,656.32 = 6,141.60 : x
2. Step 2: Convert to fraction form
   10,620.72/14,656.32 = 6,141.60/x
3. Step 3: Cross multiply
   10,620.72x = 14,656.32 × 6,141.60
4. Step 4: Simplify right side
   10,620.72x = 90,013,254.91
5. Step 5: Solve for x
   x = 90,013,254.91/10,620.72
6. Step 6: Final answer
   x = 8,475.25