Finding the Fourth Proportional to 1,312.42, 1,811.04 and 722.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.42 : 1,811.04 = 722.83 : x
2. Step 2: Convert to fraction form
   1,312.42/1,811.04 = 722.83/x
3. Step 3: Cross multiply
   1,312.42x = 1,811.04 × 722.83
4. Step 4: Simplify right side
   1,312.42x = 1,309,074.04
5. Step 5: Solve for x
   x = 1,309,074.04/1,312.42
6. Step 6: Final answer
   x = 997.45