Finding the Fourth Proportional to 1,061.97, 1,591.59 and 992.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.97 : 1,591.59 = 992.85 : x
2. Step 2: Convert to fraction form
   1,061.97/1,591.59 = 992.85/x
3. Step 3: Cross multiply
   1,061.97x = 1,591.59 × 992.85
4. Step 4: Simplify right side
   1,061.97x = 1,580,210.13
5. Step 5: Solve for x
   x = 1,580,210.13/1,061.97
6. Step 6: Final answer
   x = 1,488.00