Finding the Fourth Proportional to 2,168.89, 3,254.42 and 782.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.89 : 3,254.42 = 782.55 : x
2. Step 2: Convert to fraction form
   2,168.89/3,254.42 = 782.55/x
3. Step 3: Cross multiply
   2,168.89x = 3,254.42 × 782.55
4. Step 4: Simplify right side
   2,168.89x = 2,546,746.37
5. Step 5: Solve for x
   x = 2,546,746.37/2,168.89
6. Step 6: Final answer
   x = 1,174.22