Finding the Fourth Proportional to 1,349.55, 1,862.28 and 789.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,349.55 : 1,862.28 = 789.93 : x
2. Step 2: Convert to fraction form
   1,349.55/1,862.28 = 789.93/x
3. Step 3: Cross multiply
   1,349.55x = 1,862.28 × 789.93
4. Step 4: Simplify right side
   1,349.55x = 1,471,070.84
5. Step 5: Solve for x
   x = 1,471,070.84/1,349.55
6. Step 6: Final answer
   x = 1,090.05