Finding the Fourth Proportional to 149,338.38, 206,080.83 and 81,354

Step by Step Solution

1. Step 1: Write the proportion equation
   149,338.38 : 206,080.83 = 81,354 : x
2. Step 2: Convert to fraction form
   149,338.38/206,080.83 = 81,354/x
3. Step 3: Cross multiply
   149,338.38x = 206,080.83 × 81,354
4. Step 4: Simplify right side
   149,338.38x = 16,765,499,843.82
5. Step 5: Solve for x
   x = 16,765,499,843.82/149,338.38
6. Step 6: Final answer
   x = 112,265.18