Finding the Fourth Proportional to 21,665.12, 32,498.84 and 6,875.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.12 : 32,498.84 = 6,875.20 : x
2. Step 2: Convert to fraction form
   21,665.12/32,498.84 = 6,875.20/x
3. Step 3: Cross multiply
   21,665.12x = 32,498.84 × 6,875.20
4. Step 4: Simplify right side
   21,665.12x = 223,435,827.90
5. Step 5: Solve for x
   x = 223,435,827.90/21,665.12
6. Step 6: Final answer
   x = 10,313.16