Finding the Fourth Proportional to 3,789.72, 5,230.62 and 2,547

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789.72 : 5,230.62 = 2,547 : x
2. Step 2: Convert to fraction form
   3,789.72/5,230.62 = 2,547/x
3. Step 3: Cross multiply
   3,789.72x = 5,230.62 × 2,547
4. Step 4: Simplify right side
   3,789.72x = 13,322,389.14
5. Step 5: Solve for x
   x = 13,322,389.14/3,789.72
6. Step 6: Final answer
   x = 3,515.40