Finding the Fourth Proportional to 9,901.69, 13,664.32 and 5,425.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,901.69 : 13,664.32 = 5,425.72 : x
2. Step 2: Convert to fraction form
   9,901.69/13,664.32 = 5,425.72/x
3. Step 3: Cross multiply
   9,901.69x = 13,664.32 × 5,425.72
4. Step 4: Simplify right side
   9,901.69x = 74,138,692.42
5. Step 5: Solve for x
   x = 74,138,692.42/9,901.69
6. Step 6: Final answer
   x = 7,487.48