Finding the Fourth Proportional to 10,915.23, 16,373.72 and 5,291.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.23 : 16,373.72 = 5,291.26 : x
2. Step 2: Convert to fraction form
   10,915.23/16,373.72 = 5,291.26/x
3. Step 3: Cross multiply
   10,915.23x = 16,373.72 × 5,291.26
4. Step 4: Simplify right side
   10,915.23x = 86,637,609.69
5. Step 5: Solve for x
   x = 86,637,609.69/10,915.23
6. Step 6: Final answer
   x = 7,937.31