Finding the Fourth Proportional to 21,225.40, 31,838.06 and 7,185.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,225.40 : 31,838.06 = 7,185.52 : x
2. Step 2: Convert to fraction form
   21,225.40/31,838.06 = 7,185.52/x
3. Step 3: Cross multiply
   21,225.40x = 31,838.06 × 7,185.52
4. Step 4: Simplify right side
   21,225.40x = 228,773,016.89
5. Step 5: Solve for x
   x = 228,773,016.89/21,225.40
6. Step 6: Final answer
   x = 10,778.27