Finding the Fourth Proportional to 9,915.06, 13,682.79 and 5,723.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.06 : 13,682.79 = 5,723.31 : x
2. Step 2: Convert to fraction form
   9,915.06/13,682.79 = 5,723.31/x
3. Step 3: Cross multiply
   9,915.06x = 13,682.79 × 5,723.31
4. Step 4: Simplify right side
   9,915.06x = 78,310,848.83
5. Step 5: Solve for x
   x = 78,310,848.83/9,915.06
6. Step 6: Final answer
   x = 7,898.17