Finding the Fourth Proportional to 9,901.09, 13,663.18 and 5,424.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.09 : 13,663.18 = 5,424.80 : x
2. Step 2: Convert to fraction form
   9,901.09/13,663.18 = 5,424.80/x
3. Step 3: Cross multiply
   9,901.09x = 13,663.18 × 5,424.80
4. Step 4: Simplify right side
   9,901.09x = 74,120,018.86
5. Step 5: Solve for x
   x = 74,120,018.86/9,901.09
6. Step 6: Final answer
   x = 7,486.05