Finding the Fourth Proportional to 7,221.45, 10,824.89 and 3,927.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,221.45 : 10,824.89 = 3,927.72 : x
2. Step 2: Convert to fraction form
   7,221.45/10,824.89 = 3,927.72/x
3. Step 3: Cross multiply
   7,221.45x = 10,824.89 × 3,927.72
4. Step 4: Simplify right side
   7,221.45x = 42,517,117.31
5. Step 5: Solve for x
   x = 42,517,117.31/7,221.45
6. Step 6: Final answer
   x = 5,887.61