Finding the Fourth Proportional to 2,328.55, 3,212.26 and 1,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.55 : 3,212.26 = 1,488.78 : x
2. Step 2: Convert to fraction form
   2,328.55/3,212.26 = 1,488.78/x
3. Step 3: Cross multiply
   2,328.55x = 3,212.26 × 1,488.78
4. Step 4: Simplify right side
   2,328.55x = 4,782,344.72
5. Step 5: Solve for x
   x = 4,782,344.72/2,328.55
6. Step 6: Final answer
   x = 2,053.79