Finding the Fourth Proportional to 21,557.31, 32,325 and 9,860.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,557.31 : 32,325 = 9,860.50 : x
2. Step 2: Convert to fraction form
   21,557.31/32,325 = 9,860.50/x
3. Step 3: Cross multiply
   21,557.31x = 32,325 × 9,860.50
4. Step 4: Simplify right side
   21,557.31x = 318,740,662.50
5. Step 5: Solve for x
   x = 318,740,662.50/21,557.31
6. Step 6: Final answer
   x = 14,785.73