Finding the Fourth Proportional to 1,291.55, 1,933.52 and 851.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291.55 : 1,933.52 = 851.99 : x
2. Step 2: Convert to fraction form
   1,291.55/1,933.52 = 851.99/x
3. Step 3: Cross multiply
   1,291.55x = 1,933.52 × 851.99
4. Step 4: Simplify right side
   1,291.55x = 1,647,340.28
5. Step 5: Solve for x
   x = 1,647,340.28/1,291.55
6. Step 6: Final answer
   x = 1,275.47