Finding the Fourth Proportional to 21,665.82, 32,510.75 and 10,572.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.82 : 32,510.75 = 10,572.60 : x
2. Step 2: Convert to fraction form
   21,665.82/32,510.75 = 10,572.60/x
3. Step 3: Cross multiply
   21,665.82x = 32,510.75 × 10,572.60
4. Step 4: Simplify right side
   21,665.82x = 343,723,224.50
5. Step 5: Solve for x
   x = 343,723,224.50/21,665.82
6. Step 6: Final answer
   x = 15,864.77