Finding the Fourth Proportional to 21,101.89, 31,637.12 and 7,053.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,101.89 : 31,637.12 = 7,053.61 : x
2. Step 2: Convert to fraction form
   21,101.89/31,637.12 = 7,053.61/x
3. Step 3: Cross multiply
   21,101.89x = 31,637.12 × 7,053.61
4. Step 4: Simplify right side
   21,101.89x = 223,155,791.74
5. Step 5: Solve for x
   x = 223,155,791.74/21,101.89
6. Step 6: Final answer
   x = 10,575.16