Finding the Fourth Proportional to 1,339.30, 1,847.87 and 814.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.30 : 1,847.87 = 814.96 : x
2. Step 2: Convert to fraction form
   1,339.30/1,847.87 = 814.96/x
3. Step 3: Cross multiply
   1,339.30x = 1,847.87 × 814.96
4. Step 4: Simplify right side
   1,339.30x = 1,505,936.06
5. Step 5: Solve for x
   x = 1,505,936.06/1,339.30
6. Step 6: Final answer
   x = 1,124.42