Finding the Fourth Proportional to 21,425.31, 32,143.86 and 8,951.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,425.31 : 32,143.86 = 8,951.18 : x
2. Step 2: Convert to fraction form
   21,425.31/32,143.86 = 8,951.18/x
3. Step 3: Cross multiply
   21,425.31x = 32,143.86 × 8,951.18
4. Step 4: Simplify right side
   21,425.31x = 287,725,316.04
5. Step 5: Solve for x
   x = 287,725,316.04/21,425.31
6. Step 6: Final answer
   x = 13,429.23