Finding the Fourth Proportional to 1,098.50, 1,643.83 and 880.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.50 : 1,643.83 = 880.52 : x
2. Step 2: Convert to fraction form
   1,098.50/1,643.83 = 880.52/x
3. Step 3: Cross multiply
   1,098.50x = 1,643.83 × 880.52
4. Step 4: Simplify right side
   1,098.50x = 1,447,425.19
5. Step 5: Solve for x
   x = 1,447,425.19/1,098.50
6. Step 6: Final answer
   x = 1,317.64