Finding the Fourth Proportional to 1,339.25, 1,848.18 and 749.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.25 : 1,848.18 = 749.78 : x
2. Step 2: Convert to fraction form
   1,339.25/1,848.18 = 749.78/x
3. Step 3: Cross multiply
   1,339.25x = 1,848.18 × 749.78
4. Step 4: Simplify right side
   1,339.25x = 1,385,719.16
5. Step 5: Solve for x
   x = 1,385,719.16/1,339.25
6. Step 6: Final answer
   x = 1,034.70