Finding the Fourth Proportional to 140,329.38, 209,993.76 and 112,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,329.38 : 209,993.76 = 112,428.72 : x
2. Step 2: Convert to fraction form
   140,329.38/209,993.76 = 112,428.72/x
3. Step 3: Cross multiply
   140,329.38x = 209,993.76 × 112,428.72
4. Step 4: Simplify right side
   140,329.38x = 23,609,329,644.79
5. Step 5: Solve for x
   x = 23,609,329,644.79/140,329.38
6. Step 6: Final answer
   x = 168,242.24