Finding the Fourth Proportional to 1,009.49, 1,505.82 and 992.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.49 : 1,505.82 = 992.76 : x
2. Step 2: Convert to fraction form
   1,009.49/1,505.82 = 992.76/x
3. Step 3: Cross multiply
   1,009.49x = 1,505.82 × 992.76
4. Step 4: Simplify right side
   1,009.49x = 1,494,917.86
5. Step 5: Solve for x
   x = 1,494,917.86/1,009.49
6. Step 6: Final answer
   x = 1,480.87