Finding the Fourth Proportional to 10,215.57, 15,312.12 and 5,823.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215.57 : 15,312.12 = 5,823.35 : x
2. Step 2: Convert to fraction form
   10,215.57/15,312.12 = 5,823.35/x
3. Step 3: Cross multiply
   10,215.57x = 15,312.12 × 5,823.35
4. Step 4: Simplify right side
   10,215.57x = 89,167,834.00
5. Step 5: Solve for x
   x = 89,167,834.00/10,215.57
6. Step 6: Final answer
   x = 8,728.62