Finding the Fourth Proportional to 21,055.34, 31,586.25 and 7,010.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,055.34 : 31,586.25 = 7,010.55 : x
2. Step 2: Convert to fraction form
   21,055.34/31,586.25 = 7,010.55/x
3. Step 3: Cross multiply
   21,055.34x = 31,586.25 × 7,010.55
4. Step 4: Simplify right side
   21,055.34x = 221,436,984.94
5. Step 5: Solve for x
   x = 221,436,984.94/21,055.34
6. Step 6: Final answer
   x = 10,516.90