Finding the Fourth Proportional to 42,870.78, 59,122.98 and 35,724.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,870.78 : 59,122.98 = 35,724.42 : x
2. Step 2: Convert to fraction form
   42,870.78/59,122.98 = 35,724.42/x
3. Step 3: Cross multiply
   42,870.78x = 59,122.98 × 35,724.42
4. Step 4: Simplify right side
   42,870.78x = 2,112,134,169.17
5. Step 5: Solve for x
   x = 2,112,134,169.17/42,870.78
6. Step 6: Final answer
   x = 49,267.45