Finding the Fourth Proportional to 10,231.83, 15,347.06 and 3,990.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,231.83 : 15,347.06 = 3,990.69 : x
2. Step 2: Convert to fraction form
   10,231.83/15,347.06 = 3,990.69/x
3. Step 3: Cross multiply
   10,231.83x = 15,347.06 × 3,990.69
4. Step 4: Simplify right side
   10,231.83x = 61,245,338.92
5. Step 5: Solve for x
   x = 61,245,338.92/10,231.83
6. Step 6: Final answer
   x = 5,985.77