Finding the Fourth Proportional to 1,112.83, 1,661.09 and 981.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.83 : 1,661.09 = 981.47 : x
2. Step 2: Convert to fraction form
   1,112.83/1,661.09 = 981.47/x
3. Step 3: Cross multiply
   1,112.83x = 1,661.09 × 981.47
4. Step 4: Simplify right side
   1,112.83x = 1,630,304.15
5. Step 5: Solve for x
   x = 1,630,304.15/1,112.83
6. Step 6: Final answer
   x = 1,465.01