Finding the Fourth Proportional to 1,162.12, 1,604.04 and 719.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.12 : 1,604.04 = 719.78 : x
2. Step 2: Convert to fraction form
   1,162.12/1,604.04 = 719.78/x
3. Step 3: Cross multiply
   1,162.12x = 1,604.04 × 719.78
4. Step 4: Simplify right side
   1,162.12x = 1,154,547.89
5. Step 5: Solve for x
   x = 1,154,547.89/1,162.12
6. Step 6: Final answer
   x = 993.48