Finding the Fourth Proportional to 60,640.72, 91,046.16 and 31,079.76

Step by Step Solution

1. Step 1: Write the proportion equation
   60,640.72 : 91,046.16 = 31,079.76 : x
2. Step 2: Convert to fraction form
   60,640.72/91,046.16 = 31,079.76/x
3. Step 3: Cross multiply
   60,640.72x = 91,046.16 × 31,079.76
4. Step 4: Simplify right side
   60,640.72x = 2,829,692,801.72
5. Step 5: Solve for x
   x = 2,829,692,801.72/60,640.72
6. Step 6: Final answer
   x = 46,663.25