Finding the Fourth Proportional to 149,123.56, 205,787.46 and 81,141.88

Step by Step Solution

1. Step 1: Write the proportion equation
   149,123.56 : 205,787.46 = 81,141.88 : x
2. Step 2: Convert to fraction form
   149,123.56/205,787.46 = 81,141.88/x
3. Step 3: Cross multiply
   149,123.56x = 205,787.46 × 81,141.88
4. Step 4: Simplify right side
   149,123.56x = 16,697,981,384.82
5. Step 5: Solve for x
   x = 16,697,981,384.82/149,123.56
6. Step 6: Final answer
   x = 111,974.13