Finding the Fourth Proportional to 2,515.61, 3,471.50 and 1,396.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,515.61 : 3,471.50 = 1,396.53 : x
2. Step 2: Convert to fraction form
   2,515.61/3,471.50 = 1,396.53/x
3. Step 3: Cross multiply
   2,515.61x = 3,471.50 × 1,396.53
4. Step 4: Simplify right side
   2,515.61x = 4,848,057.39
5. Step 5: Solve for x
   x = 4,848,057.39/2,515.61
6. Step 6: Final answer
   x = 1,927.19