Finding the Fourth Proportional to 143,715.32, 198,327.49 and 86,355.59

Step by Step Solution

1. Step 1: Write the proportion equation
   143,715.32 : 198,327.49 = 86,355.59 : x
2. Step 2: Convert to fraction form
   143,715.32/198,327.49 = 86,355.59/x
3. Step 3: Cross multiply
   143,715.32x = 198,327.49 × 86,355.59
4. Step 4: Simplify right side
   143,715.32x = 17,126,688,730.73
5. Step 5: Solve for x
   x = 17,126,688,730.73/143,715.32
6. Step 6: Final answer
   x = 119,170.94