Finding the Fourth Proportional to 81,096.68, 121,601.28 and 31,189.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,096.68 : 121,601.28 = 31,189.34 : x
2. Step 2: Convert to fraction form
   81,096.68/121,601.28 = 31,189.34/x
3. Step 3: Cross multiply
   81,096.68x = 121,601.28 × 31,189.34
4. Step 4: Simplify right side
   81,096.68x = 3,792,663,397.39
5. Step 5: Solve for x
   x = 3,792,663,397.39/81,096.68
6. Step 6: Final answer
   x = 46,767.19