Finding the Fourth Proportional to 21,010.98, 31,515.63 and 5,216.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,010.98 : 31,515.63 = 5,216.04 : x
2. Step 2: Convert to fraction form
   21,010.98/31,515.63 = 5,216.04/x
3. Step 3: Cross multiply
   21,010.98x = 31,515.63 × 5,216.04
4. Step 4: Simplify right side
   21,010.98x = 164,386,786.71
5. Step 5: Solve for x
   x = 164,386,786.71/21,010.98
6. Step 6: Final answer
   x = 7,823.85