Finding the Fourth Proportional to 2,071.24, 3,106.99 and 772.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.24 : 3,106.99 = 772.27 : x
2. Step 2: Convert to fraction form
   2,071.24/3,106.99 = 772.27/x
3. Step 3: Cross multiply
   2,071.24x = 3,106.99 × 772.27
4. Step 4: Simplify right side
   2,071.24x = 2,399,435.17
5. Step 5: Solve for x
   x = 2,399,435.17/2,071.24
6. Step 6: Final answer
   x = 1,158.45