Finding the Fourth Proportional to 5,423.72, 7,484.74 and 2,939.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,423.72 : 7,484.74 = 2,939.72 : x
2. Step 2: Convert to fraction form
   5,423.72/7,484.74 = 2,939.72/x
3. Step 3: Cross multiply
   5,423.72x = 7,484.74 × 2,939.72
4. Step 4: Simplify right side
   5,423.72x = 22,003,039.87
5. Step 5: Solve for x
   x = 22,003,039.87/5,423.72
6. Step 6: Final answer
   x = 4,056.82