Finding the Fourth Proportional to 42,415.20, 59,512.50 and 42,415.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,415.20 : 59,512.50 = 42,415.20 : x
2. Step 2: Convert to fraction form
   42,415.20/59,512.50 = 42,415.20/x
3. Step 3: Cross multiply
   42,415.20x = 59,512.50 × 42,415.20
4. Step 4: Simplify right side
   42,415.20x = 2,524,234,590
5. Step 5: Solve for x
   x = 2,524,234,590/42,415.20
6. Step 6: Final answer
   x = 59,512.50