Finding the Fourth Proportional to 143,088.13, 197,462.40 and 89,404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   143,088.13 : 197,462.40 = 89,404.30 : x
2. Step 2: Convert to fraction form
   143,088.13/197,462.40 = 89,404.30/x
3. Step 3: Cross multiply
   143,088.13x = 197,462.40 × 89,404.30
4. Step 4: Simplify right side
   143,088.13x = 17,653,987,648.32
5. Step 5: Solve for x
   x = 17,653,987,648.32/143,088.13
6. Step 6: Final answer
   x = 123,378.42