Finding the Fourth Proportional to 42,739.80, 58,980.06 and 25,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,739.80 : 58,980.06 = 25,978.20 : x
2. Step 2: Convert to fraction form
   42,739.80/58,980.06 = 25,978.20/x
3. Step 3: Cross multiply
   42,739.80x = 58,980.06 × 25,978.20
4. Step 4: Simplify right side
   42,739.80x = 1,532,195,794.69
5. Step 5: Solve for x
   x = 1,532,195,794.69/42,739.80
6. Step 6: Final answer
   x = 35,849.39