Finding the Fourth Proportional to 2,636.61, 3,958.56 and 1,338.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.61 : 3,958.56 = 1,338.99 : x
2. Step 2: Convert to fraction form
   2,636.61/3,958.56 = 1,338.99/x
3. Step 3: Cross multiply
   2,636.61x = 3,958.56 × 1,338.99
4. Step 4: Simplify right side
   2,636.61x = 5,300,472.25
5. Step 5: Solve for x
   x = 5,300,472.25/2,636.61
6. Step 6: Final answer
   x = 2,010.34