Finding the Fourth Proportional to 10,290.61, 15,438.06 and 5,850.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,290.61 : 15,438.06 = 5,850.31 : x
2. Step 2: Convert to fraction form
   10,290.61/15,438.06 = 5,850.31/x
3. Step 3: Cross multiply
   10,290.61x = 15,438.06 × 5,850.31
4. Step 4: Simplify right side
   10,290.61x = 90,317,436.80
5. Step 5: Solve for x
   x = 90,317,436.80/10,290.61
6. Step 6: Final answer
   x = 8,776.68