Finding the Fourth Proportional to 1,162.32, 1,603.12 and 719.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.32 : 1,603.12 = 719.86 : x
2. Step 2: Convert to fraction form
   1,162.32/1,603.12 = 719.86/x
3. Step 3: Cross multiply
   1,162.32x = 1,603.12 × 719.86
4. Step 4: Simplify right side
   1,162.32x = 1,154,021.96
5. Step 5: Solve for x
   x = 1,154,021.96/1,162.32
6. Step 6: Final answer
   x = 992.86