Finding the Fourth Proportional to 21,456.96, 32,192.06 and 9,620.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.96 : 32,192.06 = 9,620.70 : x
2. Step 2: Convert to fraction form
   21,456.96/32,192.06 = 9,620.70/x
3. Step 3: Cross multiply
   21,456.96x = 32,192.06 × 9,620.70
4. Step 4: Simplify right side
   21,456.96x = 309,710,103.54
5. Step 5: Solve for x
   x = 309,710,103.54/21,456.96
6. Step 6: Final answer
   x = 14,434.02