Finding the Fourth Proportional to 21,678.57, 32,501.93 and 9,665.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,678.57 : 32,501.93 = 9,665.60 : x
2. Step 2: Convert to fraction form
   21,678.57/32,501.93 = 9,665.60/x
3. Step 3: Cross multiply
   21,678.57x = 32,501.93 × 9,665.60
4. Step 4: Simplify right side
   21,678.57x = 314,150,443.77
5. Step 5: Solve for x
   x = 314,150,443.77/21,678.57
6. Step 6: Final answer
   x = 14,491.29