Finding the Fourth Proportional to 239,300.57, 359,090.39 and 89,645.99

Step by Step Solution

1. Step 1: Write the proportion equation
   239,300.57 : 359,090.39 = 89,645.99 : x
2. Step 2: Convert to fraction form
   239,300.57/359,090.39 = 89,645.99/x
3. Step 3: Cross multiply
   239,300.57x = 359,090.39 × 89,645.99
4. Step 4: Simplify right side
   239,300.57x = 32,191,011,939.70
5. Step 5: Solve for x
   x = 32,191,011,939.70/239,300.57
6. Step 6: Final answer
   x = 134,521.25