Finding the Fourth Proportional to 21,665.50, 32,499.40 and 6,875.57

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.50 : 32,499.40 = 6,875.57 : x
2. Step 2: Convert to fraction form
   21,665.50/32,499.40 = 6,875.57/x
3. Step 3: Cross multiply
   21,665.50x = 32,499.40 × 6,875.57
4. Step 4: Simplify right side
   21,665.50x = 223,451,899.66
5. Step 5: Solve for x
   x = 223,451,899.66/21,665.50
6. Step 6: Final answer
   x = 10,313.72