Finding the Fourth Proportional to 949.86, 1,421.82 and 719.61

Step by Step Solution

1. Step 1: Write the proportion equation
   949.86 : 1,421.82 = 719.61 : x
2. Step 2: Convert to fraction form
   949.86/1,421.82 = 719.61/x
3. Step 3: Cross multiply
   949.86x = 1,421.82 × 719.61
4. Step 4: Simplify right side
   949.86x = 1,023,155.89
5. Step 5: Solve for x
   x = 1,023,155.89/949.86
6. Step 6: Final answer
   x = 1,077.16