Finding the Fourth Proportional to 1,521.48, 2,267.61 and 1,227.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.48 : 2,267.61 = 1,227.72 : x
2. Step 2: Convert to fraction form
   1,521.48/2,267.61 = 1,227.72/x
3. Step 3: Cross multiply
   1,521.48x = 2,267.61 × 1,227.72
4. Step 4: Simplify right side
   1,521.48x = 2,783,990.15
5. Step 5: Solve for x
   x = 2,783,990.15/1,521.48
6. Step 6: Final answer
   x = 1,829.79