Finding the Fourth Proportional to 1,339.12, 1,847.37 and 815.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.12 : 1,847.37 = 815.46 : x
2. Step 2: Convert to fraction form
   1,339.12/1,847.37 = 815.46/x
3. Step 3: Cross multiply
   1,339.12x = 1,847.37 × 815.46
4. Step 4: Simplify right side
   1,339.12x = 1,506,456.34
5. Step 5: Solve for x
   x = 1,506,456.34/1,339.12
6. Step 6: Final answer
   x = 1,124.96