Finding the Fourth Proportional to 5,111.11, 7,053.12 and 2,986.77

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.11 : 7,053.12 = 2,986.77 : x
2. Step 2: Convert to fraction form
   5,111.11/7,053.12 = 2,986.77/x
3. Step 3: Cross multiply
   5,111.11x = 7,053.12 × 2,986.77
4. Step 4: Simplify right side
   5,111.11x = 21,066,047.22
5. Step 5: Solve for x
   x = 21,066,047.22/5,111.11
6. Step 6: Final answer
   x = 4,121.62