Finding the Fourth Proportional to 21,096.36, 31,638.16 and 7,052.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.36 : 31,638.16 = 7,052.78 : x
2. Step 2: Convert to fraction form
   21,096.36/31,638.16 = 7,052.78/x
3. Step 3: Cross multiply
   21,096.36x = 31,638.16 × 7,052.78
4. Step 4: Simplify right side
   21,096.36x = 223,137,070.00
5. Step 5: Solve for x
   x = 223,137,070.00/21,096.36
6. Step 6: Final answer
   x = 10,577.04