Finding the Fourth Proportional to 21,103.58, 31,639.65 and 7,055.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,103.58 : 31,639.65 = 7,055.29 : x
2. Step 2: Convert to fraction form
   21,103.58/31,639.65 = 7,055.29/x
3. Step 3: Cross multiply
   21,103.58x = 31,639.65 × 7,055.29
4. Step 4: Simplify right side
   21,103.58x = 223,227,008.33
5. Step 5: Solve for x
   x = 223,227,008.33/21,103.58
6. Step 6: Final answer
   x = 10,577.68