Finding the Fourth Proportional to 747.98, 1,123.25 and 715.58

Step by Step Solution

1. Step 1: Write the proportion equation
   747.98 : 1,123.25 = 715.58 : x
2. Step 2: Convert to fraction form
   747.98/1,123.25 = 715.58/x
3. Step 3: Cross multiply
   747.98x = 1,123.25 × 715.58
4. Step 4: Simplify right side
   747.98x = 803,766.04
5. Step 5: Solve for x
   x = 803,766.04/747.98
6. Step 6: Final answer
   x = 1,074.59