Finding the Fourth Proportional to 1,522.10, 2,279.10 and 971.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,522.10 : 2,279.10 = 971.30 : x
2. Step 2: Convert to fraction form
   1,522.10/2,279.10 = 971.30/x
3. Step 3: Cross multiply
   1,522.10x = 2,279.10 × 971.30
4. Step 4: Simplify right side
   1,522.10x = 2,213,689.83
5. Step 5: Solve for x
   x = 2,213,689.83/1,522.10
6. Step 6: Final answer
   x = 1,454.37