Finding the Fourth Proportional to 143,545.37, 198,079.71 and 83,120.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,545.37 : 198,079.71 = 83,120.10 : x
2. Step 2: Convert to fraction form
   143,545.37/198,079.71 = 83,120.10/x
3. Step 3: Cross multiply
   143,545.37x = 198,079.71 × 83,120.10
4. Step 4: Simplify right side
   143,545.37x = 16,464,405,303.17
5. Step 5: Solve for x
   x = 16,464,405,303.17/143,545.37
6. Step 6: Final answer
   x = 114,698.27