Finding the Fourth Proportional to 1,168.25, 1,612.16 and 637.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.25 : 1,612.16 = 637.15 : x
2. Step 2: Convert to fraction form
   1,168.25/1,612.16 = 637.15/x
3. Step 3: Cross multiply
   1,168.25x = 1,612.16 × 637.15
4. Step 4: Simplify right side
   1,168.25x = 1,027,184.56
5. Step 5: Solve for x
   x = 1,027,184.56/1,168.25
6. Step 6: Final answer
   x = 879.25