Finding the Fourth Proportional to 108,057.78, 149,198.76 and 69,839.96

Step by Step Solution

1. Step 1: Write the proportion equation
   108,057.78 : 149,198.76 = 69,839.96 : x
2. Step 2: Convert to fraction form
   108,057.78/149,198.76 = 69,839.96/x
3. Step 3: Cross multiply
   108,057.78x = 149,198.76 × 69,839.96
4. Step 4: Simplify right side
   108,057.78x = 10,420,034,684.46
5. Step 5: Solve for x
   x = 10,420,034,684.46/108,057.78
6. Step 6: Final answer
   x = 96,430.21