Finding the Fourth Proportional to 9,090.31, 12,544.49 and 5,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.31 : 12,544.49 = 5,111.42 : x
2. Step 2: Convert to fraction form
   9,090.31/12,544.49 = 5,111.42/x
3. Step 3: Cross multiply
   9,090.31x = 12,544.49 × 5,111.42
4. Step 4: Simplify right side
   9,090.31x = 64,120,148.94
5. Step 5: Solve for x
   x = 64,120,148.94/9,090.31
6. Step 6: Final answer
   x = 7,053.68