Finding the Fourth Proportional to 239,699.79, 359,456.28 and 89,858.34

Step by Step Solution

1. Step 1: Write the proportion equation
   239,699.79 : 359,456.28 = 89,858.34 : x
2. Step 2: Convert to fraction form
   239,699.79/359,456.28 = 89,858.34/x
3. Step 3: Cross multiply
   239,699.79x = 359,456.28 × 89,858.34
4. Step 4: Simplify right side
   239,699.79x = 32,300,144,623.38
5. Step 5: Solve for x
   x = 32,300,144,623.38/239,699.79
6. Step 6: Final answer
   x = 134,752.49