Finding the Fourth Proportional to 5,111.08, 7,053.47 and 2,986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.08 : 7,053.47 = 2,986.31 : x
2. Step 2: Convert to fraction form
   5,111.08/7,053.47 = 2,986.31/x
3. Step 3: Cross multiply
   5,111.08x = 7,053.47 × 2,986.31
4. Step 4: Simplify right side
   5,111.08x = 21,063,848.00
5. Step 5: Solve for x
   x = 21,063,848.00/5,111.08
6. Step 6: Final answer
   x = 4,121.21