Finding the Fourth Proportional to 25,128.61, 37,693.71 and 12,641.82

Step by Step Solution

1. Step 1: Write the proportion equation
   25,128.61 : 37,693.71 = 12,641.82 : x
2. Step 2: Convert to fraction form
   25,128.61/37,693.71 = 12,641.82/x
3. Step 3: Cross multiply
   25,128.61x = 37,693.71 × 12,641.82
4. Step 4: Simplify right side
   25,128.61x = 476,517,096.95
5. Step 5: Solve for x
   x = 476,517,096.95/25,128.61
6. Step 6: Final answer
   x = 18,963.13