Finding the Fourth Proportional to 1,255.99, 1,732.17 and 813.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,255.99 : 1,732.17 = 813.46 : x
2. Step 2: Convert to fraction form
   1,255.99/1,732.17 = 813.46/x
3. Step 3: Cross multiply
   1,255.99x = 1,732.17 × 813.46
4. Step 4: Simplify right side
   1,255.99x = 1,409,051.01
5. Step 5: Solve for x
   x = 1,409,051.01/1,255.99
6. Step 6: Final answer
   x = 1,121.86