Finding the Fourth Proportional to 9,089.72, 12,543.81 and 5,111.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,089.72 : 12,543.81 = 5,111.77 : x
2. Step 2: Convert to fraction form
   9,089.72/12,543.81 = 5,111.77/x
3. Step 3: Cross multiply
   9,089.72x = 12,543.81 × 5,111.77
4. Step 4: Simplify right side
   9,089.72x = 64,121,091.03
5. Step 5: Solve for x
   x = 64,121,091.03/9,089.72
6. Step 6: Final answer
   x = 7,054.24