Finding the Fourth Proportional to 3,967.59, 5,477.84 and 2,551.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.59 : 5,477.84 = 2,551.91 : x
2. Step 2: Convert to fraction form
   3,967.59/5,477.84 = 2,551.91/x
3. Step 3: Cross multiply
   3,967.59x = 5,477.84 × 2,551.91
4. Step 4: Simplify right side
   3,967.59x = 13,978,954.67
5. Step 5: Solve for x
   x = 13,978,954.67/3,967.59
6. Step 6: Final answer
   x = 3,523.29