Finding the Fourth Proportional to 9,091.92, 12,545.28 and 5,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,091.92 : 12,545.28 = 5,112.72 : x
2. Step 2: Convert to fraction form
   9,091.92/12,545.28 = 5,112.72/x
3. Step 3: Cross multiply
   9,091.92x = 12,545.28 × 5,112.72
4. Step 4: Simplify right side
   9,091.92x = 64,140,503.96
5. Step 5: Solve for x
   x = 64,140,503.96/9,091.92
6. Step 6: Final answer
   x = 7,054.67