Finding the Fourth Proportional to 1,793.90, 2,691.50 and 561.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,793.90 : 2,691.50 = 561.39 : x
2. Step 2: Convert to fraction form
   1,793.90/2,691.50 = 561.39/x
3. Step 3: Cross multiply
   1,793.90x = 2,691.50 × 561.39
4. Step 4: Simplify right side
   1,793.90x = 1,510,978.38
5. Step 5: Solve for x
   x = 1,510,978.38/1,793.90
6. Step 6: Final answer
   x = 842.29