Finding the Fourth Proportional to 2,373.72, 3,560.59 and 642.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,373.72 : 3,560.59 = 642.35 : x
2. Step 2: Convert to fraction form
   2,373.72/3,560.59 = 642.35/x
3. Step 3: Cross multiply
   2,373.72x = 3,560.59 × 642.35
4. Step 4: Simplify right side
   2,373.72x = 2,287,127.18
5. Step 5: Solve for x
   x = 2,287,127.18/2,373.72
6. Step 6: Final answer
   x = 963.52