Finding the Fourth Proportional to 2,488.86, 3,732.61 and 928.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.86 : 3,732.61 = 928.80 : x
2. Step 2: Convert to fraction form
   2,488.86/3,732.61 = 928.80/x
3. Step 3: Cross multiply
   2,488.86x = 3,732.61 × 928.80
4. Step 4: Simplify right side
   2,488.86x = 3,466,848.17
5. Step 5: Solve for x
   x = 3,466,848.17/2,488.86
6. Step 6: Final answer
   x = 1,392.95