Finding the Fourth Proportional to 1,522.10, 2,280.69 and 1,279.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.10 : 2,280.69 = 1,279.10 : x
2. Step 2: Convert to fraction form
   1,522.10/2,280.69 = 1,279.10/x
3. Step 3: Cross multiply
   1,522.10x = 2,280.69 × 1,279.10
4. Step 4: Simplify right side
   1,522.10x = 2,917,230.58
5. Step 5: Solve for x
   x = 2,917,230.58/1,522.10
6. Step 6: Final answer
   x = 1,916.58