Finding the Fourth Proportional to 1,062.42, 1,465.59 and 642.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,062.42 : 1,465.59 = 642.52 : x
2. Step 2: Convert to fraction form
   1,062.42/1,465.59 = 642.52/x
3. Step 3: Cross multiply
   1,062.42x = 1,465.59 × 642.52
4. Step 4: Simplify right side
   1,062.42x = 941,670.89
5. Step 5: Solve for x
   x = 941,670.89/1,062.42
6. Step 6: Final answer
   x = 886.35