Finding the Fourth Proportional to 9,900.13, 13,662.20 and 5,362.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.13 : 13,662.20 = 5,362.80 : x
2. Step 2: Convert to fraction form
   9,900.13/13,662.20 = 5,362.80/x
3. Step 3: Cross multiply
   9,900.13x = 13,662.20 × 5,362.80
4. Step 4: Simplify right side
   9,900.13x = 73,267,646.16
5. Step 5: Solve for x
   x = 73,267,646.16/9,900.13
6. Step 6: Final answer
   x = 7,400.68