Finding the Fourth Proportional to 9,962.72, 14,871.64 and 9,140.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,962.72 : 14,871.64 = 9,140.96 : x
2. Step 2: Convert to fraction form
   9,962.72/14,871.64 = 9,140.96/x
3. Step 3: Cross multiply
   9,962.72x = 14,871.64 × 9,140.96
4. Step 4: Simplify right side
   9,962.72x = 135,941,066.37
5. Step 5: Solve for x
   x = 135,941,066.37/9,962.72
6. Step 6: Final answer
   x = 13,644.98