Finding the Fourth Proportional to 2,112.31, 3,168.92 and 880.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.31 : 3,168.92 = 880.00 : x
2. Step 2: Convert to fraction form
   2,112.31/3,168.92 = 880.00/x
3. Step 3: Cross multiply
   2,112.31x = 3,168.92 × 880.00
4. Step 4: Simplify right side
   2,112.31x = 2,788,643.88
5. Step 5: Solve for x
   x = 2,788,643.88/2,112.31
6. Step 6: Final answer
   x = 1,320.19