Finding the Fourth Proportional to 13,008.09, 19,513.05 and 5,216.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,008.09 : 19,513.05 = 5,216.91 : x
2. Step 2: Convert to fraction form
   13,008.09/19,513.05 = 5,216.91/x
3. Step 3: Cross multiply
   13,008.09x = 19,513.05 × 5,216.91
4. Step 4: Simplify right side
   13,008.09x = 101,797,762.28
5. Step 5: Solve for x
   x = 101,797,762.28/13,008.09
6. Step 6: Final answer
   x = 7,825.72