Finding the Fourth Proportional to 2,459.86, 3,690.60 and 999.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.86 : 3,690.60 = 999.16 : x
2. Step 2: Convert to fraction form
   2,459.86/3,690.60 = 999.16/x
3. Step 3: Cross multiply
   2,459.86x = 3,690.60 × 999.16
4. Step 4: Simplify right side
   2,459.86x = 3,687,499.90
5. Step 5: Solve for x
   x = 3,687,499.90/2,459.86
6. Step 6: Final answer
   x = 1,499.07