Finding the Fourth Proportional to 1,555.34, 2,329.30 and 851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.34 : 2,329.30 = 851.50 : x
2. Step 2: Convert to fraction form
   1,555.34/2,329.30 = 851.50/x
3. Step 3: Cross multiply
   1,555.34x = 2,329.30 × 851.50
4. Step 4: Simplify right side
   1,555.34x = 1,983,399.23
5. Step 5: Solve for x
   x = 1,983,399.23/1,555.34
6. Step 6: Final answer
   x = 1,275.22