Finding the Fourth Proportional to 1,339.24, 1,848.36 and 815.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.24 : 1,848.36 = 815.08 : x
2. Step 2: Convert to fraction form
   1,339.24/1,848.36 = 815.08/x
3. Step 3: Cross multiply
   1,339.24x = 1,848.36 × 815.08
4. Step 4: Simplify right side
   1,339.24x = 1,506,561.27
5. Step 5: Solve for x
   x = 1,506,561.27/1,339.24
6. Step 6: Final answer
   x = 1,124.94