Finding the Fourth Proportional to 9,900.04, 13,662.01 and 5,423.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.04 : 13,662.01 = 5,423.79 : x
2. Step 2: Convert to fraction form
   9,900.04/13,662.01 = 5,423.79/x
3. Step 3: Cross multiply
   9,900.04x = 13,662.01 × 5,423.79
4. Step 4: Simplify right side
   9,900.04x = 74,099,873.22
5. Step 5: Solve for x
   x = 74,099,873.22/9,900.04
6. Step 6: Final answer
   x = 7,484.81