Finding the Fourth Proportional to 10,914.24, 16,368.72 and 3,988.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,914.24 : 16,368.72 = 3,988.80 : x
2. Step 2: Convert to fraction form
   10,914.24/16,368.72 = 3,988.80/x
3. Step 3: Cross multiply
   10,914.24x = 16,368.72 × 3,988.80
4. Step 4: Simplify right side
   10,914.24x = 65,291,550.34
5. Step 5: Solve for x
   x = 65,291,550.34/10,914.24
6. Step 6: Final answer
   x = 5,982.24