Finding the Fourth Proportional to 2,876.96, 4,314.50 and 928.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,876.96 : 4,314.50 = 928.70 : x
2. Step 2: Convert to fraction form
   2,876.96/4,314.50 = 928.70/x
3. Step 3: Cross multiply
   2,876.96x = 4,314.50 × 928.70
4. Step 4: Simplify right side
   2,876.96x = 4,006,876.15
5. Step 5: Solve for x
   x = 4,006,876.15/2,876.96
6. Step 6: Final answer
   x = 1,392.75