Finding the Fourth Proportional to 42,665.70, 64,047.15 and 25,145.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.70 : 64,047.15 = 25,145.40 : x
2. Step 2: Convert to fraction form
   42,665.70/64,047.15 = 25,145.40/x
3. Step 3: Cross multiply
   42,665.70x = 64,047.15 × 25,145.40
4. Step 4: Simplify right side
   42,665.70x = 1,610,491,205.61
5. Step 5: Solve for x
   x = 1,610,491,205.61/42,665.70
6. Step 6: Final answer
   x = 37,746.74