Finding the Fourth Proportional to 42,007.20, 57,970.98 and 25,868.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.20 : 57,970.98 = 25,868.40 : x
2. Step 2: Convert to fraction form
   42,007.20/57,970.98 = 25,868.40/x
3. Step 3: Cross multiply
   42,007.20x = 57,970.98 × 25,868.40
4. Step 4: Simplify right side
   42,007.20x = 1,499,616,499.03
5. Step 5: Solve for x
   x = 1,499,616,499.03/42,007.20
6. Step 6: Final answer
   x = 35,699.03