Finding the Fourth Proportional to 2,621.02, 3,932.20 and 772.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.02 : 3,932.20 = 772.19 : x
2. Step 2: Convert to fraction form
   2,621.02/3,932.20 = 772.19/x
3. Step 3: Cross multiply
   2,621.02x = 3,932.20 × 772.19
4. Step 4: Simplify right side
   2,621.02x = 3,036,405.52
5. Step 5: Solve for x
   x = 3,036,405.52/2,621.02
6. Step 6: Final answer
   x = 1,158.48