Finding the Fourth Proportional to 5,111.96, 7,053.80 and 2,986.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.96 : 7,053.80 = 2,986.98 : x
2. Step 2: Convert to fraction form
   5,111.96/7,053.80 = 2,986.98/x
3. Step 3: Cross multiply
   5,111.96x = 7,053.80 × 2,986.98
4. Step 4: Simplify right side
   5,111.96x = 21,069,559.52
5. Step 5: Solve for x
   x = 21,069,559.52/5,111.96
6. Step 6: Final answer
   x = 4,121.62