Finding the Fourth Proportional to 143,086.95, 197,460.75 and 89,403.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,086.95 : 197,460.75 = 89,403.10 : x
2. Step 2: Convert to fraction form
   143,086.95/197,460.75 = 89,403.10/x
3. Step 3: Cross multiply
   143,086.95x = 197,460.75 × 89,403.10
4. Step 4: Simplify right side
   143,086.95x = 17,653,603,019.93
5. Step 5: Solve for x
   x = 17,653,603,019.93/143,086.95
6. Step 6: Final answer
   x = 123,376.75