Finding the Fourth Proportional to 2,972.98, 4,458.24 and 1,123.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,972.98 : 4,458.24 = 1,123.78 : x
2. Step 2: Convert to fraction form
   2,972.98/4,458.24 = 1,123.78/x
3. Step 3: Cross multiply
   2,972.98x = 4,458.24 × 1,123.78
4. Step 4: Simplify right side
   2,972.98x = 5,010,080.95
5. Step 5: Solve for x
   x = 5,010,080.95/2,972.98
6. Step 6: Final answer
   x = 1,685.21