Finding the Fourth Proportional to 143,918.10, 198,586.89 and 83,493.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,918.10 : 198,586.89 = 83,493.72 : x
2. Step 2: Convert to fraction form
   143,918.10/198,586.89 = 83,493.72/x
3. Step 3: Cross multiply
   143,918.10x = 198,586.89 × 83,493.72
4. Step 4: Simplify right side
   143,918.10x = 16,580,758,189.33
5. Step 5: Solve for x
   x = 16,580,758,189.33/143,918.10
6. Step 6: Final answer
   x = 115,209.68