Finding the Fourth Proportional to 3,701.30, 5,103.81 and 2,638.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,701.30 : 5,103.81 = 2,638.98 : x
2. Step 2: Convert to fraction form
   3,701.30/5,103.81 = 2,638.98/x
3. Step 3: Cross multiply
   3,701.30x = 5,103.81 × 2,638.98
4. Step 4: Simplify right side
   3,701.30x = 13,468,852.51
5. Step 5: Solve for x
   x = 13,468,852.51/3,701.30
6. Step 6: Final answer
   x = 3,638.96