Finding the Fourth Proportional to 85,721.38, 118,296.72 and 49,422.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,721.38 : 118,296.72 = 49,422.10 : x
2. Step 2: Convert to fraction form
   85,721.38/118,296.72 = 49,422.10/x
3. Step 3: Cross multiply
   85,721.38x = 118,296.72 × 49,422.10
4. Step 4: Simplify right side
   85,721.38x = 5,846,472,559.48
5. Step 5: Solve for x
   x = 5,846,472,559.48/85,721.38
6. Step 6: Final answer
   x = 68,203.21