Finding the Fourth Proportional to 1,339.73, 1,848.78 and 742.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.73 : 1,848.78 = 742.19 : x
2. Step 2: Convert to fraction form
   1,339.73/1,848.78 = 742.19/x
3. Step 3: Cross multiply
   1,339.73x = 1,848.78 × 742.19
4. Step 4: Simplify right side
   1,339.73x = 1,372,150.65
5. Step 5: Solve for x
   x = 1,372,150.65/1,339.73
6. Step 6: Final answer
   x = 1,024.20