Finding the Fourth Proportional to 21,277.89, 31,921.41 and 10,610.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,277.89 : 31,921.41 = 10,610.06 : x
2. Step 2: Convert to fraction form
   21,277.89/31,921.41 = 10,610.06/x
3. Step 3: Cross multiply
   21,277.89x = 31,921.41 × 10,610.06
4. Step 4: Simplify right side
   21,277.89x = 338,688,075.38
5. Step 5: Solve for x
   x = 338,688,075.38/21,277.89
6. Step 6: Final answer
   x = 15,917.38