Finding the Fourth Proportional to 3,719.36, 5,131.69 and 2,657.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,719.36 : 5,131.69 = 2,657.45 : x
2. Step 2: Convert to fraction form
   3,719.36/5,131.69 = 2,657.45/x
3. Step 3: Cross multiply
   3,719.36x = 5,131.69 × 2,657.45
4. Step 4: Simplify right side
   3,719.36x = 13,637,215.78
5. Step 5: Solve for x
   x = 13,637,215.78/3,719.36
6. Step 6: Final answer
   x = 3,666.55