Finding the Fourth Proportional to 2,638.35, 3,958.05 and 1,817.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.35 : 3,958.05 = 1,817.01 : x
2. Step 2: Convert to fraction form
   2,638.35/3,958.05 = 1,817.01/x
3. Step 3: Cross multiply
   2,638.35x = 3,958.05 × 1,817.01
4. Step 4: Simplify right side
   2,638.35x = 7,191,816.43
5. Step 5: Solve for x
   x = 7,191,816.43/2,638.35
6. Step 6: Final answer
   x = 2,725.88