Finding the Fourth Proportional to 42,642.40, 58,861.20 and 25,656.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,642.40 : 58,861.20 = 25,656.16 : x
2. Step 2: Convert to fraction form
   42,642.40/58,861.20 = 25,656.16/x
3. Step 3: Cross multiply
   42,642.40x = 58,861.20 × 25,656.16
4. Step 4: Simplify right side
   42,642.40x = 1,510,152,364.99
5. Step 5: Solve for x
   x = 1,510,152,364.99/42,642.40
6. Step 6: Final answer
   x = 35,414.34