Finding the Fourth Proportional to 1,113.02, 1,661.30 and 981.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.02 : 1,661.30 = 981.69 : x
2. Step 2: Convert to fraction form
   1,113.02/1,661.30 = 981.69/x
3. Step 3: Cross multiply
   1,113.02x = 1,661.30 × 981.69
4. Step 4: Simplify right side
   1,113.02x = 1,630,887.73
5. Step 5: Solve for x
   x = 1,630,887.73/1,113.02
6. Step 6: Final answer
   x = 1,465.29