Finding the Fourth Proportional to 9,900.96, 13,663.08 and 5,424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.96 : 13,663.08 = 5,424.72 : x
2. Step 2: Convert to fraction form
   9,900.96/13,663.08 = 5,424.72/x
3. Step 3: Cross multiply
   9,900.96x = 13,663.08 × 5,424.72
4. Step 4: Simplify right side
   9,900.96x = 74,118,383.34
5. Step 5: Solve for x
   x = 74,118,383.34/9,900.96
6. Step 6: Final answer
   x = 7,485.98