Finding the Fourth Proportional to 81,149.31, 111,873.15 and 69,938.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,149.31 : 111,873.15 = 69,938.10 : x
2. Step 2: Convert to fraction form
   81,149.31/111,873.15 = 69,938.10/x
3. Step 3: Cross multiply
   81,149.31x = 111,873.15 × 69,938.10
4. Step 4: Simplify right side
   81,149.31x = 7,824,195,552.02
5. Step 5: Solve for x
   x = 7,824,195,552.02/81,149.31
6. Step 6: Final answer
   x = 96,417.28