Finding the Fourth Proportional to 143,091.43, 197,426.16 and 89,430.95

Step by Step Solution

1. Step 1: Write the proportion equation
   143,091.43 : 197,426.16 = 89,430.95 : x
2. Step 2: Convert to fraction form
   143,091.43/197,426.16 = 89,430.95/x
3. Step 3: Cross multiply
   143,091.43x = 197,426.16 × 89,430.95
4. Step 4: Simplify right side
   143,091.43x = 17,656,009,537.22
5. Step 5: Solve for x
   x = 17,656,009,537.22/143,091.43
6. Step 6: Final answer
   x = 123,389.71