Finding the Fourth Proportional to 2,635.34, 3,952.88 and 786.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.34 : 3,952.88 = 786.47 : x
2. Step 2: Convert to fraction form
   2,635.34/3,952.88 = 786.47/x
3. Step 3: Cross multiply
   2,635.34x = 3,952.88 × 786.47
4. Step 4: Simplify right side
   2,635.34x = 3,108,827.48
5. Step 5: Solve for x
   x = 3,108,827.48/2,635.34
6. Step 6: Final answer
   x = 1,179.67