Finding the Fourth Proportional to 146,046.80, 218,013.72 and 128,332.10

Step by Step Solution

1. Step 1: Write the proportion equation
   146,046.80 : 218,013.72 = 128,332.10 : x
2. Step 2: Convert to fraction form
   146,046.80/218,013.72 = 128,332.10/x
3. Step 3: Cross multiply
   146,046.80x = 218,013.72 × 128,332.10
4. Step 4: Simplify right side
   146,046.80x = 27,978,158,516.41
5. Step 5: Solve for x
   x = 27,978,158,516.41/146,046.80
6. Step 6: Final answer
   x = 191,569.82