Finding the Fourth Proportional to 1,522.48, 2,269.10 and 1,228.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.48 : 2,269.10 = 1,228.72 : x
2. Step 2: Convert to fraction form
   1,522.48/2,269.10 = 1,228.72/x
3. Step 3: Cross multiply
   1,522.48x = 2,269.10 × 1,228.72
4. Step 4: Simplify right side
   1,522.48x = 2,788,088.55
5. Step 5: Solve for x
   x = 2,788,088.55/1,522.48
6. Step 6: Final answer
   x = 1,831.28