Finding the Fourth Proportional to 21,641.72, 32,436.54 and 14,148.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,641.72 : 32,436.54 = 14,148.80 : x
2. Step 2: Convert to fraction form
   21,641.72/32,436.54 = 14,148.80/x
3. Step 3: Cross multiply
   21,641.72x = 32,436.54 × 14,148.80
4. Step 4: Simplify right side
   21,641.72x = 458,938,117.15
5. Step 5: Solve for x
   x = 458,938,117.15/21,641.72
6. Step 6: Final answer
   x = 21,206.18