Finding the Fourth Proportional to 2,428.86, 3,643.32 and 697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.86 : 3,643.32 = 697.50 : x
2. Step 2: Convert to fraction form
   2,428.86/3,643.32 = 697.50/x
3. Step 3: Cross multiply
   2,428.86x = 3,643.32 × 697.50
4. Step 4: Simplify right side
   2,428.86x = 2,541,215.70
5. Step 5: Solve for x
   x = 2,541,215.70/2,428.86
6. Step 6: Final answer
   x = 1,046.26