Finding the Fourth Proportional to 2,461.21, 3,688.62 and 999.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,461.21 : 3,688.62 = 999.57 : x
2. Step 2: Convert to fraction form
   2,461.21/3,688.62 = 999.57/x
3. Step 3: Cross multiply
   2,461.21x = 3,688.62 × 999.57
4. Step 4: Simplify right side
   2,461.21x = 3,687,033.89
5. Step 5: Solve for x
   x = 3,687,033.89/2,461.21
6. Step 6: Final answer
   x = 1,498.06