Finding the Fourth Proportional to 10,456.38, 15,690.69 and 3,887.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,456.38 : 15,690.69 = 3,887.10 : x
2. Step 2: Convert to fraction form
   10,456.38/15,690.69 = 3,887.10/x
3. Step 3: Cross multiply
   10,456.38x = 15,690.69 × 3,887.10
4. Step 4: Simplify right side
   10,456.38x = 60,991,281.10
5. Step 5: Solve for x
   x = 60,991,281.10/10,456.38
6. Step 6: Final answer
   x = 5,832.93