Finding the Fourth Proportional to 3,991.63, 5,507.88 and 2,266.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.63 : 5,507.88 = 2,266.86 : x
2. Step 2: Convert to fraction form
   3,991.63/5,507.88 = 2,266.86/x
3. Step 3: Cross multiply
   3,991.63x = 5,507.88 × 2,266.86
4. Step 4: Simplify right side
   3,991.63x = 12,485,595.69
5. Step 5: Solve for x
   x = 12,485,595.69/3,991.63
6. Step 6: Final answer
   x = 3,127.95