Finding the Fourth Proportional to 9,900.62, 13,662.32 and 5,423.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.62 : 13,662.32 = 5,423.52 : x
2. Step 2: Convert to fraction form
   9,900.62/13,662.32 = 5,423.52/x
3. Step 3: Cross multiply
   9,900.62x = 13,662.32 × 5,423.52
4. Step 4: Simplify right side
   9,900.62x = 74,097,865.77
5. Step 5: Solve for x
   x = 74,097,865.77/9,900.62
6. Step 6: Final answer
   x = 7,484.16