Finding the Fourth Proportional to 21,432.06, 32,153.18 and 8,945.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,432.06 : 32,153.18 = 8,945.15 : x
2. Step 2: Convert to fraction form
   21,432.06/32,153.18 = 8,945.15/x
3. Step 3: Cross multiply
   21,432.06x = 32,153.18 × 8,945.15
4. Step 4: Simplify right side
   21,432.06x = 287,614,812.59
5. Step 5: Solve for x
   x = 287,614,812.59/21,432.06
6. Step 6: Final answer
   x = 13,419.84