Finding the Fourth Proportional to 47,902.59, 71,479.26 and 42,921.50

Step by Step Solution

1. Step 1: Write the proportion equation
   47,902.59 : 71,479.26 = 42,921.50 : x
2. Step 2: Convert to fraction form
   47,902.59/71,479.26 = 42,921.50/x
3. Step 3: Cross multiply
   47,902.59x = 71,479.26 × 42,921.50
4. Step 4: Simplify right side
   47,902.59x = 3,067,996,700.69
5. Step 5: Solve for x
   x = 3,067,996,700.69/47,902.59
6. Step 6: Final answer
   x = 64,046.57