Finding the Fourth Proportional to 21,428.54, 32,147.94 and 8,941.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,428.54 : 32,147.94 = 8,941.61 : x
2. Step 2: Convert to fraction form
   21,428.54/32,147.94 = 8,941.61/x
3. Step 3: Cross multiply
   21,428.54x = 32,147.94 × 8,941.61
4. Step 4: Simplify right side
   21,428.54x = 287,454,417.63
5. Step 5: Solve for x
   x = 287,454,417.63/21,428.54
6. Step 6: Final answer
   x = 13,414.56