Finding the Fourth Proportional to 89,469.26, 123,479.54 and 57,730.42

Step by Step Solution

1. Step 1: Write the proportion equation
   89,469.26 : 123,479.54 = 57,730.42 : x
2. Step 2: Convert to fraction form
   89,469.26/123,479.54 = 57,730.42/x
3. Step 3: Cross multiply
   89,469.26x = 123,479.54 × 57,730.42
4. Step 4: Simplify right side
   89,469.26x = 7,128,525,787.79
5. Step 5: Solve for x
   x = 7,128,525,787.79/89,469.26
6. Step 6: Final answer
   x = 79,675.70