Finding the Fourth Proportional to 21,762, 32,638.42 and 10,657.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,762 : 32,638.42 = 10,657.50 : x
2. Step 2: Convert to fraction form
   21,762/32,638.42 = 10,657.50/x
3. Step 3: Cross multiply
   21,762x = 32,638.42 × 10,657.50
4. Step 4: Simplify right side
   21,762x = 347,843,961.15
5. Step 5: Solve for x
   x = 347,843,961.15/21,762
6. Step 6: Final answer
   x = 15,984.01