Finding the Fourth Proportional to 2,386.28, 3,580.81 and 999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.28 : 3,580.81 = 999.50 : x
2. Step 2: Convert to fraction form
   2,386.28/3,580.81 = 999.50/x
3. Step 3: Cross multiply
   2,386.28x = 3,580.81 × 999.50
4. Step 4: Simplify right side
   2,386.28x = 3,579,031.05
5. Step 5: Solve for x
   x = 3,579,031.05/2,386.28
6. Step 6: Final answer
   x = 1,499.84