Finding the Fourth Proportional to 1,550.34, 2,139.95 and 992.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.34 : 2,139.95 = 992.30 : x
2. Step 2: Convert to fraction form
   1,550.34/2,139.95 = 992.30/x
3. Step 3: Cross multiply
   1,550.34x = 2,139.95 × 992.30
4. Step 4: Simplify right side
   1,550.34x = 2,123,476.20
5. Step 5: Solve for x
   x = 2,123,476.20/1,550.34
6. Step 6: Final answer
   x = 1,369.68