Finding the Fourth Proportional to 1,812.08, 2,716.69 and 772.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,812.08 : 2,716.69 = 772.24 : x
2. Step 2: Convert to fraction form
   1,812.08/2,716.69 = 772.24/x
3. Step 3: Cross multiply
   1,812.08x = 2,716.69 × 772.24
4. Step 4: Simplify right side
   1,812.08x = 2,097,936.69
5. Step 5: Solve for x
   x = 2,097,936.69/1,812.08
6. Step 6: Final answer
   x = 1,157.75