Finding the Fourth Proportional to 8,053.31, 11,118.72 and 7,212.53

Step by Step Solution

1. Step 1: Write the proportion equation
   8,053.31 : 11,118.72 = 7,212.53 : x
2. Step 2: Convert to fraction form
   8,053.31/11,118.72 = 7,212.53/x
3. Step 3: Cross multiply
   8,053.31x = 11,118.72 × 7,212.53
4. Step 4: Simplify right side
   8,053.31x = 80,194,045.97
5. Step 5: Solve for x
   x = 80,194,045.97/8,053.31
6. Step 6: Final answer
   x = 9,957.90