Finding the Fourth Proportional to 3,977.50, 5,491.83 and 2,931.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977.50 : 5,491.83 = 2,931.10 : x
2. Step 2: Convert to fraction form
   3,977.50/5,491.83 = 2,931.10/x
3. Step 3: Cross multiply
   3,977.50x = 5,491.83 × 2,931.10
4. Step 4: Simplify right side
   3,977.50x = 16,097,102.91
5. Step 5: Solve for x
   x = 16,097,102.91/3,977.50
6. Step 6: Final answer
   x = 4,047.04