Finding the Fourth Proportional to 2,931.98, 4,397.49 and 879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.98 : 4,397.49 = 879.50 : x
2. Step 2: Convert to fraction form
   2,931.98/4,397.49 = 879.50/x
3. Step 3: Cross multiply
   2,931.98x = 4,397.49 × 879.50
4. Step 4: Simplify right side
   2,931.98x = 3,867,592.46
5. Step 5: Solve for x
   x = 3,867,592.46/2,931.98
6. Step 6: Final answer
   x = 1,319.11