Finding the Fourth Proportional to 10,436.16, 15,639.58 and 5,758.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.16 : 15,639.58 = 5,758.34 : x
2. Step 2: Convert to fraction form
   10,436.16/15,639.58 = 5,758.34/x
3. Step 3: Cross multiply
   10,436.16x = 15,639.58 × 5,758.34
4. Step 4: Simplify right side
   10,436.16x = 90,058,019.10
5. Step 5: Solve for x
   x = 90,058,019.10/10,436.16
6. Step 6: Final answer
   x = 8,629.42