Finding the Fourth Proportional to 2,880.25, 4,319.31 and 1,123.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.25 : 4,319.31 = 1,123.96 : x
2. Step 2: Convert to fraction form
   2,880.25/4,319.31 = 1,123.96/x
3. Step 3: Cross multiply
   2,880.25x = 4,319.31 × 1,123.96
4. Step 4: Simplify right side
   2,880.25x = 4,854,731.67
5. Step 5: Solve for x
   x = 4,854,731.67/2,880.25
6. Step 6: Final answer
   x = 1,685.52