Finding the Fourth Proportional to 16,972.32, 23,421.78 and 9,897.39

Step by Step Solution

1. Step 1: Write the proportion equation
   16,972.32 : 23,421.78 = 9,897.39 : x
2. Step 2: Convert to fraction form
   16,972.32/23,421.78 = 9,897.39/x
3. Step 3: Cross multiply
   16,972.32x = 23,421.78 × 9,897.39
4. Step 4: Simplify right side
   16,972.32x = 231,814,491.15
5. Step 5: Solve for x
   x = 231,814,491.15/16,972.32
6. Step 6: Final answer
   x = 13,658.39