Finding the Fourth Proportional to 42,856.08, 59,147.28 and 25,861.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,856.08 : 59,147.28 = 25,861.20 : x
2. Step 2: Convert to fraction form
   42,856.08/59,147.28 = 25,861.20/x
3. Step 3: Cross multiply
   42,856.08x = 59,147.28 × 25,861.20
4. Step 4: Simplify right side
   42,856.08x = 1,529,619,637.54
5. Step 5: Solve for x
   x = 1,529,619,637.54/42,856.08
6. Step 6: Final answer
   x = 35,692.01