Finding the Fourth Proportional to 1,191.37, 1,643.88 and 719.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.37 : 1,643.88 = 719.14 : x
2. Step 2: Convert to fraction form
   1,191.37/1,643.88 = 719.14/x
3. Step 3: Cross multiply
   1,191.37x = 1,643.88 × 719.14
4. Step 4: Simplify right side
   1,191.37x = 1,182,179.86
5. Step 5: Solve for x
   x = 1,182,179.86/1,191.37
6. Step 6: Final answer
   x = 992.29