Finding the Fourth Proportional to 2,308.50, 3,189.20 and 1,513.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.50 : 3,189.20 = 1,513.71 : x
2. Step 2: Convert to fraction form
   2,308.50/3,189.20 = 1,513.71/x
3. Step 3: Cross multiply
   2,308.50x = 3,189.20 × 1,513.71
4. Step 4: Simplify right side
   2,308.50x = 4,827,523.93
5. Step 5: Solve for x
   x = 4,827,523.93/2,308.50
6. Step 6: Final answer
   x = 2,091.20