Finding the Fourth Proportional to 10,131.12, 15,196.52 and 5,197.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.12 : 15,196.52 = 5,197.91 : x
2. Step 2: Convert to fraction form
   10,131.12/15,196.52 = 5,197.91/x
3. Step 3: Cross multiply
   10,131.12x = 15,196.52 × 5,197.91
4. Step 4: Simplify right side
   10,131.12x = 78,990,194.26
5. Step 5: Solve for x
   x = 78,990,194.26/10,131.12
6. Step 6: Final answer
   x = 7,796.79