Finding the Fourth Proportional to 1,098.83, 1,515.88 and 632.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.83 : 1,515.88 = 632.81 : x
2. Step 2: Convert to fraction form
   1,098.83/1,515.88 = 632.81/x
3. Step 3: Cross multiply
   1,098.83x = 1,515.88 × 632.81
4. Step 4: Simplify right side
   1,098.83x = 959,268.60
5. Step 5: Solve for x
   x = 959,268.60/1,098.83
6. Step 6: Final answer
   x = 872.99