Finding the Fourth Proportional to 1,245.56, 1,718.81 and 748.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.56 : 1,718.81 = 748.10 : x
2. Step 2: Convert to fraction form
   1,245.56/1,718.81 = 748.10/x
3. Step 3: Cross multiply
   1,245.56x = 1,718.81 × 748.10
4. Step 4: Simplify right side
   1,245.56x = 1,285,841.76
5. Step 5: Solve for x
   x = 1,285,841.76/1,245.56
6. Step 6: Final answer
   x = 1,032.34