Finding the Fourth Proportional to 5,290.18, 7,300.68 and 3,021.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.18 : 7,300.68 = 3,021.72 : x
2. Step 2: Convert to fraction form
   5,290.18/7,300.68 = 3,021.72/x
3. Step 3: Cross multiply
   5,290.18x = 7,300.68 × 3,021.72
4. Step 4: Simplify right side
   5,290.18x = 22,060,574.27
5. Step 5: Solve for x
   x = 22,060,574.27/5,290.18
6. Step 6: Final answer
   x = 4,170.10