Finding the Fourth Proportional to 1,520.34, 2,276.83 and 869.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.34 : 2,276.83 = 869.10 : x
2. Step 2: Convert to fraction form
   1,520.34/2,276.83 = 869.10/x
3. Step 3: Cross multiply
   1,520.34x = 2,276.83 × 869.10
4. Step 4: Simplify right side
   1,520.34x = 1,978,792.95
5. Step 5: Solve for x
   x = 1,978,792.95/1,520.34
6. Step 6: Final answer
   x = 1,301.55