Finding the Fourth Proportional to 25,290.28, 37,915.98 and 12,135.34

Step by Step Solution

1. Step 1: Write the proportion equation
   25,290.28 : 37,915.98 = 12,135.34 : x
2. Step 2: Convert to fraction form
   25,290.28/37,915.98 = 12,135.34/x
3. Step 3: Cross multiply
   25,290.28x = 37,915.98 × 12,135.34
4. Step 4: Simplify right side
   25,290.28x = 460,123,308.73
5. Step 5: Solve for x
   x = 460,123,308.73/25,290.28
6. Step 6: Final answer
   x = 18,193.68