Finding the Fourth Proportional to 2,386.45, 3,580.22 and 999.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.45 : 3,580.22 = 999.10 : x
2. Step 2: Convert to fraction form
   2,386.45/3,580.22 = 999.10/x
3. Step 3: Cross multiply
   2,386.45x = 3,580.22 × 999.10
4. Step 4: Simplify right side
   2,386.45x = 3,576,997.80
5. Step 5: Solve for x
   x = 3,576,997.80/2,386.45
6. Step 6: Final answer
   x = 1,498.88