Finding the Fourth Proportional to 57,721.58, 79,581.72 and 47,335.02

Step by Step Solution

1. Step 1: Write the proportion equation
   57,721.58 : 79,581.72 = 47,335.02 : x
2. Step 2: Convert to fraction form
   57,721.58/79,581.72 = 47,335.02/x
3. Step 3: Cross multiply
   57,721.58x = 79,581.72 × 47,335.02
4. Step 4: Simplify right side
   57,721.58x = 3,767,002,307.83
5. Step 5: Solve for x
   x = 3,767,002,307.83/57,721.58
6. Step 6: Final answer
   x = 65,261.59