Finding the Fourth Proportional to 1,662.12, 2,488.52 and 880.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.12 : 2,488.52 = 880.36 : x
2. Step 2: Convert to fraction form
   1,662.12/2,488.52 = 880.36/x
3. Step 3: Cross multiply
   1,662.12x = 2,488.52 × 880.36
4. Step 4: Simplify right side
   1,662.12x = 2,190,781.02
5. Step 5: Solve for x
   x = 2,190,781.02/1,662.12
6. Step 6: Final answer
   x = 1,318.06