Finding the Fourth Proportional to 143,612.50, 198,189.81 and 89,880.34

Step by Step Solution

1. Step 1: Write the proportion equation
   143,612.50 : 198,189.81 = 89,880.34 : x
2. Step 2: Convert to fraction form
   143,612.50/198,189.81 = 89,880.34/x
3. Step 3: Cross multiply
   143,612.50x = 198,189.81 × 89,880.34
4. Step 4: Simplify right side
   143,612.50x = 17,813,367,507.34
5. Step 5: Solve for x
   x = 17,813,367,507.34/143,612.50
6. Step 6: Final answer
   x = 124,037.72