Finding the Fourth Proportional to 1,317.30, 1,818.18 and 875.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.30 : 1,818.18 = 875.22 : x
2. Step 2: Convert to fraction form
   1,317.30/1,818.18 = 875.22/x
3. Step 3: Cross multiply
   1,317.30x = 1,818.18 × 875.22
4. Step 4: Simplify right side
   1,317.30x = 1,591,307.50
5. Step 5: Solve for x
   x = 1,591,307.50/1,317.30
6. Step 6: Final answer
   x = 1,208.01