Finding the Fourth Proportional to 143,086.64, 197,460.32 and 89,402.79

Step by Step Solution

1. Step 1: Write the proportion equation
   143,086.64 : 197,460.32 = 89,402.79 : x
2. Step 2: Convert to fraction form
   143,086.64/197,460.32 = 89,402.79/x
3. Step 3: Cross multiply
   143,086.64x = 197,460.32 × 89,402.79
4. Step 4: Simplify right side
   143,086.64x = 17,653,502,758.50
5. Step 5: Solve for x
   x = 17,653,502,758.50/143,086.64
6. Step 6: Final answer
   x = 123,376.32