Finding the Fourth Proportional to 1,659.98, 2,490.59 and 880.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,659.98 : 2,490.59 = 880.02 : x
2. Step 2: Convert to fraction form
   1,659.98/2,490.59 = 880.02/x
3. Step 3: Cross multiply
   1,659.98x = 2,490.59 × 880.02
4. Step 4: Simplify right side
   1,659.98x = 2,191,771.21
5. Step 5: Solve for x
   x = 2,191,771.21/1,659.98
6. Step 6: Final answer
   x = 1,320.36