Finding the Fourth Proportional to 7,210.36, 10,791.98 and 3,915.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,210.36 : 10,791.98 = 3,915.24 : x
2. Step 2: Convert to fraction form
   7,210.36/10,791.98 = 3,915.24/x
3. Step 3: Cross multiply
   7,210.36x = 10,791.98 × 3,915.24
4. Step 4: Simplify right side
   7,210.36x = 42,253,191.78
5. Step 5: Solve for x
   x = 42,253,191.78/7,210.36
6. Step 6: Final answer
   x = 5,860.07