Finding the Fourth Proportional to 1,218.52, 1,682.55 and 1,157.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218.52 : 1,682.55 = 1,157.37 : x
2. Step 2: Convert to fraction form
   1,218.52/1,682.55 = 1,157.37/x
3. Step 3: Cross multiply
   1,218.52x = 1,682.55 × 1,157.37
4. Step 4: Simplify right side
   1,218.52x = 1,947,332.89
5. Step 5: Solve for x
   x = 1,947,332.89/1,218.52
6. Step 6: Final answer
   x = 1,598.11