Finding the Fourth Proportional to 68,721.27, 103,121.55 and 37,131.42

Step by Step Solution

1. Step 1: Write the proportion equation
   68,721.27 : 103,121.55 = 37,131.42 : x
2. Step 2: Convert to fraction form
   68,721.27/103,121.55 = 37,131.42/x
3. Step 3: Cross multiply
   68,721.27x = 103,121.55 × 37,131.42
4. Step 4: Simplify right side
   68,721.27x = 3,829,049,584.10
5. Step 5: Solve for x
   x = 3,829,049,584.10/68,721.27
6. Step 6: Final answer
   x = 55,718.55