Finding the Fourth Proportional to 1,185.61, 1,635.38 and 719.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.61 : 1,635.38 = 719.86 : x
2. Step 2: Convert to fraction form
   1,185.61/1,635.38 = 719.86/x
3. Step 3: Cross multiply
   1,185.61x = 1,635.38 × 719.86
4. Step 4: Simplify right side
   1,185.61x = 1,177,239.90
5. Step 5: Solve for x
   x = 1,177,239.90/1,185.61
6. Step 6: Final answer
   x = 992.94