Finding the Fourth Proportional to 143,028.32, 197,417.38 and 89,280.98

Step by Step Solution

1. Step 1: Write the proportion equation
   143,028.32 : 197,417.38 = 89,280.98 : x
2. Step 2: Convert to fraction form
   143,028.32/197,417.38 = 89,280.98/x
3. Step 3: Cross multiply
   143,028.32x = 197,417.38 × 89,280.98
4. Step 4: Simplify right side
   143,028.32x = 17,625,617,155.43
5. Step 5: Solve for x
   x = 17,625,617,155.43/143,028.32
6. Step 6: Final answer
   x = 123,231.66