Finding the Fourth Proportional to 2,168.32, 3,250.50 and 781.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.32 : 3,250.50 = 781.34 : x
2. Step 2: Convert to fraction form
   2,168.32/3,250.50 = 781.34/x
3. Step 3: Cross multiply
   2,168.32x = 3,250.50 × 781.34
4. Step 4: Simplify right side
   2,168.32x = 2,539,745.67
5. Step 5: Solve for x
   x = 2,539,745.67/2,168.32
6. Step 6: Final answer
   x = 1,171.30