Finding the Fourth Proportional to 10,887.86, 16,321.80 and 3,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,887.86 : 16,321.80 = 3,957.50 : x
2. Step 2: Convert to fraction form
   10,887.86/16,321.80 = 3,957.50/x
3. Step 3: Cross multiply
   10,887.86x = 16,321.80 × 3,957.50
4. Step 4: Simplify right side
   10,887.86x = 64,593,523.50
5. Step 5: Solve for x
   x = 64,593,523.50/10,887.86
6. Step 6: Final answer
   x = 5,932.62