Finding the Fourth Proportional to 2,620.44, 3,931.25 and 771.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.44 : 3,931.25 = 771.62 : x
2. Step 2: Convert to fraction form
   2,620.44/3,931.25 = 771.62/x
3. Step 3: Cross multiply
   2,620.44x = 3,931.25 × 771.62
4. Step 4: Simplify right side
   2,620.44x = 3,033,407.61
5. Step 5: Solve for x
   x = 3,033,407.61/2,620.44
6. Step 6: Final answer
   x = 1,157.59