Finding the Fourth Proportional to 2,453.73, 3,385.56 and 1,557.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.73 : 3,385.56 = 1,557.15 : x
2. Step 2: Convert to fraction form
   2,453.73/3,385.56 = 1,557.15/x
3. Step 3: Cross multiply
   2,453.73x = 3,385.56 × 1,557.15
4. Step 4: Simplify right side
   2,453.73x = 5,271,824.75
5. Step 5: Solve for x
   x = 5,271,824.75/2,453.73
6. Step 6: Final answer
   x = 2,148.49