Finding the Fourth Proportional to 2,405.61, 3,608.65 and 999.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.61 : 3,608.65 = 999.73 : x
2. Step 2: Convert to fraction form
   2,405.61/3,608.65 = 999.73/x
3. Step 3: Cross multiply
   2,405.61x = 3,608.65 × 999.73
4. Step 4: Simplify right side
   2,405.61x = 3,607,682.57
5. Step 5: Solve for x
   x = 3,607,682.57/2,405.61
6. Step 6: Final answer
   x = 1,499.70