Finding the Fourth Proportional to 9,111.29, 12,573.90 and 5,133.11

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.29 : 12,573.90 = 5,133.11 : x
2. Step 2: Convert to fraction form
   9,111.29/12,573.90 = 5,133.11/x
3. Step 3: Cross multiply
   9,111.29x = 12,573.90 × 5,133.11
4. Step 4: Simplify right side
   9,111.29x = 64,543,148.96
5. Step 5: Solve for x
   x = 64,543,148.96/9,111.29
6. Step 6: Final answer
   x = 7,083.87