Finding the Fourth Proportional to 1,067.68, 1,598.16 and 1,042.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.68 : 1,598.16 = 1,042.72 : x
2. Step 2: Convert to fraction form
   1,067.68/1,598.16 = 1,042.72/x
3. Step 3: Cross multiply
   1,067.68x = 1,598.16 × 1,042.72
4. Step 4: Simplify right side
   1,067.68x = 1,666,433.40
5. Step 5: Solve for x
   x = 1,666,433.40/1,067.68
6. Step 6: Final answer
   x = 1,560.80