Finding the Fourth Proportional to 11,647.60, 17,457.42 and 5,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,647.60 : 17,457.42 = 5,399.12 : x
2. Step 2: Convert to fraction form
   11,647.60/17,457.42 = 5,399.12/x
3. Step 3: Cross multiply
   11,647.60x = 17,457.42 × 5,399.12
4. Step 4: Simplify right side
   11,647.60x = 94,254,705.47
5. Step 5: Solve for x
   x = 94,254,705.47/11,647.60
6. Step 6: Final answer
   x = 8,092.20