Finding the Fourth Proportional to 1,191.71, 1,644.30 and 719.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.71 : 1,644.30 = 719.69 : x
2. Step 2: Convert to fraction form
   1,191.71/1,644.30 = 719.69/x
3. Step 3: Cross multiply
   1,191.71x = 1,644.30 × 719.69
4. Step 4: Simplify right side
   1,191.71x = 1,183,374.45
5. Step 5: Solve for x
   x = 1,183,374.45/1,191.71
6. Step 6: Final answer
   x = 993.00