Finding the Fourth Proportional to 3,709.84, 5,116.72 and 2,528.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.84 : 5,116.72 = 2,528.86 : x
2. Step 2: Convert to fraction form
   3,709.84/5,116.72 = 2,528.86/x
3. Step 3: Cross multiply
   3,709.84x = 5,116.72 × 2,528.86
4. Step 4: Simplify right side
   3,709.84x = 12,939,468.54
5. Step 5: Solve for x
   x = 12,939,468.54/3,709.84
6. Step 6: Final answer
   x = 3,487.88