Finding the Fourth Proportional to 47,978.52, 71,601.33 and 42,729.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,978.52 : 71,601.33 = 42,729.72 : x
2. Step 2: Convert to fraction form
   47,978.52/71,601.33 = 42,729.72/x
3. Step 3: Cross multiply
   47,978.52x = 71,601.33 × 42,729.72
4. Step 4: Simplify right side
   47,978.52x = 3,059,504,782.53
5. Step 5: Solve for x
   x = 3,059,504,782.53/47,978.52
6. Step 6: Final answer
   x = 63,768.22