Finding the Fourth Proportional to 42,740.64, 58,978.80 and 25,745.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,740.64 : 58,978.80 = 25,745.76 : x
2. Step 2: Convert to fraction form
   42,740.64/58,978.80 = 25,745.76/x
3. Step 3: Cross multiply
   42,740.64x = 58,978.80 × 25,745.76
4. Step 4: Simplify right side
   42,740.64x = 1,518,454,029.89
5. Step 5: Solve for x
   x = 1,518,454,029.89/42,740.64
6. Step 6: Final answer
   x = 35,527.17