Finding the Fourth Proportional to 21,061.48, 31,570.02 and 7,017.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.48 : 31,570.02 = 7,017.76 : x
2. Step 2: Convert to fraction form
   21,061.48/31,570.02 = 7,017.76/x
3. Step 3: Cross multiply
   21,061.48x = 31,570.02 × 7,017.76
4. Step 4: Simplify right side
   21,061.48x = 221,550,823.56
5. Step 5: Solve for x
   x = 221,550,823.56/21,061.48
6. Step 6: Final answer
   x = 10,519.24