Finding the Fourth Proportional to 1,513.42, 2,272.61 and 1,399.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.42 : 2,272.61 = 1,399.73 : x
2. Step 2: Convert to fraction form
   1,513.42/2,272.61 = 1,399.73/x
3. Step 3: Cross multiply
   1,513.42x = 2,272.61 × 1,399.73
4. Step 4: Simplify right side
   1,513.42x = 3,181,032.53
5. Step 5: Solve for x
   x = 3,181,032.53/1,513.42
6. Step 6: Final answer
   x = 2,101.89