Finding the Fourth Proportional to 3,917.72, 5,405.50 and 2,238.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.72 : 5,405.50 = 2,238.91 : x
2. Step 2: Convert to fraction form
   3,917.72/5,405.50 = 2,238.91/x
3. Step 3: Cross multiply
   3,917.72x = 5,405.50 × 2,238.91
4. Step 4: Simplify right side
   3,917.72x = 12,102,428.01
5. Step 5: Solve for x
   x = 12,102,428.01/3,917.72
6. Step 6: Final answer
   x = 3,089.15