Finding the Fourth Proportional to 146,123.20, 218,747.40 and 137,472.40

Step by Step Solution

1. Step 1: Write the proportion equation
   146,123.20 : 218,747.40 = 137,472.40 : x
2. Step 2: Convert to fraction form
   146,123.20/218,747.40 = 137,472.40/x
3. Step 3: Cross multiply
   146,123.20x = 218,747.40 × 137,472.40
4. Step 4: Simplify right side
   146,123.20x = 30,071,730,071.76
5. Step 5: Solve for x
   x = 30,071,730,071.76/146,123.20
6. Step 6: Final answer
   x = 205,797.09