Finding the Fourth Proportional to 21,620.16, 32,418.96 and 10,210.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,620.16 : 32,418.96 = 10,210.18 : x
2. Step 2: Convert to fraction form
   21,620.16/32,418.96 = 10,210.18/x
3. Step 3: Cross multiply
   21,620.16x = 32,418.96 × 10,210.18
4. Step 4: Simplify right side
   21,620.16x = 331,003,417.01
5. Step 5: Solve for x
   x = 331,003,417.01/21,620.16
6. Step 6: Final answer
   x = 15,309.94