Finding the Fourth Proportional to 5,164.80, 7,127.34 and 2,806.98

Step by Step Solution

1. Step 1: Write the proportion equation
   5,164.80 : 7,127.34 = 2,806.98 : x
2. Step 2: Convert to fraction form
   5,164.80/7,127.34 = 2,806.98/x
3. Step 3: Cross multiply
   5,164.80x = 7,127.34 × 2,806.98
4. Step 4: Simplify right side
   5,164.80x = 20,006,300.83
5. Step 5: Solve for x
   x = 20,006,300.83/5,164.80
6. Step 6: Final answer
   x = 3,873.59