Finding the Fourth Proportional to 3,699.30, 5,100.27 and 2,638.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.30 : 5,100.27 = 2,638.28 : x
2. Step 2: Convert to fraction form
   3,699.30/5,100.27 = 2,638.28/x
3. Step 3: Cross multiply
   3,699.30x = 5,100.27 × 2,638.28
4. Step 4: Simplify right side
   3,699.30x = 13,455,914.83
5. Step 5: Solve for x
   x = 13,455,914.83/3,699.30
6. Step 6: Final answer
   x = 3,637.42