Finding the Fourth Proportional to 1,349.86, 1,862.85 and 790.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.86 : 1,862.85 = 790.38 : x
2. Step 2: Convert to fraction form
   1,349.86/1,862.85 = 790.38/x
3. Step 3: Cross multiply
   1,349.86x = 1,862.85 × 790.38
4. Step 4: Simplify right side
   1,349.86x = 1,472,359.38
5. Step 5: Solve for x
   x = 1,472,359.38/1,349.86
6. Step 6: Final answer
   x = 1,090.75