Finding the Fourth Proportional to 81,898.80, 123,090.56 and 67,949.32

Step by Step Solution

1. Step 1: Write the proportion equation
   81,898.80 : 123,090.56 = 67,949.32 : x
2. Step 2: Convert to fraction form
   81,898.80/123,090.56 = 67,949.32/x
3. Step 3: Cross multiply
   81,898.80x = 123,090.56 × 67,949.32
4. Step 4: Simplify right side
   81,898.80x = 8,363,919,850.42
5. Step 5: Solve for x
   x = 8,363,919,850.42/81,898.80
6. Step 6: Final answer
   x = 102,125.06