Finding the Fourth Proportional to 21,720.51, 32,569.83 and 10,610.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,720.51 : 32,569.83 = 10,610.55 : x
2. Step 2: Convert to fraction form
   21,720.51/32,569.83 = 10,610.55/x
3. Step 3: Cross multiply
   21,720.51x = 32,569.83 × 10,610.55
4. Step 4: Simplify right side
   21,720.51x = 345,583,809.71
5. Step 5: Solve for x
   x = 345,583,809.71/21,720.51
6. Step 6: Final answer
   x = 15,910.48