Finding the Fourth Proportional to 42,660.57, 58,860.79 and 25,659.35

Step by Step Solution

1. Step 1: Write the proportion equation
   42,660.57 : 58,860.79 = 25,659.35 : x
2. Step 2: Convert to fraction form
   42,660.57/58,860.79 = 25,659.35/x
3. Step 3: Cross multiply
   42,660.57x = 58,860.79 × 25,659.35
4. Step 4: Simplify right side
   42,660.57x = 1,510,329,611.89
5. Step 5: Solve for x
   x = 1,510,329,611.89/42,660.57
6. Step 6: Final answer
   x = 35,403.41