Finding the Fourth Proportional to 1,168.32, 1,611.72 and 775.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.32 : 1,611.72 = 775.74 : x
2. Step 2: Convert to fraction form
   1,168.32/1,611.72 = 775.74/x
3. Step 3: Cross multiply
   1,168.32x = 1,611.72 × 775.74
4. Step 4: Simplify right side
   1,168.32x = 1,250,275.67
5. Step 5: Solve for x
   x = 1,250,275.67/1,168.32
6. Step 6: Final answer
   x = 1,070.15