Finding the Fourth Proportional to 1,815.76, 2,502.24 and 1,225.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.76 : 2,502.24 = 1,225.27 : x
2. Step 2: Convert to fraction form
   1,815.76/2,502.24 = 1,225.27/x
3. Step 3: Cross multiply
   1,815.76x = 2,502.24 × 1,225.27
4. Step 4: Simplify right side
   1,815.76x = 3,065,913.48
5. Step 5: Solve for x
   x = 3,065,913.48/1,815.76
6. Step 6: Final answer
   x = 1,688.50