Finding the Fourth Proportional to 143,005.50, 197,296.56 and 89,270.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,005.50 : 197,296.56 = 89,270.10 : x
2. Step 2: Convert to fraction form
   143,005.50/197,296.56 = 89,270.10/x
3. Step 3: Cross multiply
   143,005.50x = 197,296.56 × 89,270.10
4. Step 4: Simplify right side
   143,005.50x = 17,612,683,640.86
5. Step 5: Solve for x
   x = 17,612,683,640.86/143,005.50
6. Step 6: Final answer
   x = 123,160.88