Finding the Fourth Proportional to 10,391.94, 15,588.45 and 5,196.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.94 : 15,588.45 = 5,196.06 : x
2. Step 2: Convert to fraction form
   10,391.94/15,588.45 = 5,196.06/x
3. Step 3: Cross multiply
   10,391.94x = 15,588.45 × 5,196.06
4. Step 4: Simplify right side
   10,391.94x = 80,998,521.51
5. Step 5: Solve for x
   x = 80,998,521.51/10,391.94
6. Step 6: Final answer
   x = 7,794.36