Finding the Fourth Proportional to 21,665.76, 32,483.90 and 10,415.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,665.76 : 32,483.90 = 10,415.16 : x
2. Step 2: Convert to fraction form
   21,665.76/32,483.90 = 10,415.16/x
3. Step 3: Cross multiply
   21,665.76x = 32,483.90 × 10,415.16
4. Step 4: Simplify right side
   21,665.76x = 338,325,015.92
5. Step 5: Solve for x
   x = 338,325,015.92/21,665.76
6. Step 6: Final answer
   x = 15,615.65