Finding the Fourth Proportional to 106,429.18, 146,719.67 and 83,728.75

Step by Step Solution

1. Step 1: Write the proportion equation
   106,429.18 : 146,719.67 = 83,728.75 : x
2. Step 2: Convert to fraction form
   106,429.18/146,719.67 = 83,728.75/x
3. Step 3: Cross multiply
   106,429.18x = 146,719.67 × 83,728.75
4. Step 4: Simplify right side
   106,429.18x = 12,284,654,569.51
5. Step 5: Solve for x
   x = 12,284,654,569.51/106,429.18
6. Step 6: Final answer
   x = 115,425.62