Finding the Fourth Proportional to 1,812.06, 2,717.55 and 772.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,812.06 : 2,717.55 = 772.05 : x
2. Step 2: Convert to fraction form
   1,812.06/2,717.55 = 772.05/x
3. Step 3: Cross multiply
   1,812.06x = 2,717.55 × 772.05
4. Step 4: Simplify right side
   1,812.06x = 2,098,084.48
5. Step 5: Solve for x
   x = 2,098,084.48/1,812.06
6. Step 6: Final answer
   x = 1,157.84