Finding the Fourth Proportional to 21,111.84, 31,645.59 and 10,005.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.84 : 31,645.59 = 10,005.22 : x
2. Step 2: Convert to fraction form
   21,111.84/31,645.59 = 10,005.22/x
3. Step 3: Cross multiply
   21,111.84x = 31,645.59 × 10,005.22
4. Step 4: Simplify right side
   21,111.84x = 316,621,092.02
5. Step 5: Solve for x
   x = 316,621,092.02/21,111.84
6. Step 6: Final answer
   x = 14,997.32