Finding the Fourth Proportional to 3,931.59, 5,422.51 and 2,438.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.59 : 5,422.51 = 2,438.67 : x
2. Step 2: Convert to fraction form
   3,931.59/5,422.51 = 2,438.67/x
3. Step 3: Cross multiply
   3,931.59x = 5,422.51 × 2,438.67
4. Step 4: Simplify right side
   3,931.59x = 13,223,712.46
5. Step 5: Solve for x
   x = 13,223,712.46/3,931.59
6. Step 6: Final answer
   x = 3,363.45