Finding the Fourth Proportional to 1,559.60, 2,152.16 and 851.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.60 : 2,152.16 = 851.30 : x
2. Step 2: Convert to fraction form
   1,559.60/2,152.16 = 851.30/x
3. Step 3: Cross multiply
   1,559.60x = 2,152.16 × 851.30
4. Step 4: Simplify right side
   1,559.60x = 1,832,139.75
5. Step 5: Solve for x
   x = 1,832,139.75/1,559.60
6. Step 6: Final answer
   x = 1,174.75