Finding the Fourth Proportional to 3,931.48, 5,890.28 and 2,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.48 : 5,890.28 = 2,078.50 : x
2. Step 2: Convert to fraction form
   3,931.48/5,890.28 = 2,078.50/x
3. Step 3: Cross multiply
   3,931.48x = 5,890.28 × 2,078.50
4. Step 4: Simplify right side
   3,931.48x = 12,242,946.98
5. Step 5: Solve for x
   x = 12,242,946.98/3,931.48
6. Step 6: Final answer
   x = 3,114.08