Finding the Fourth Proportional to 2,429.76, 3,644.70 and 786.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,429.76 : 3,644.70 = 786.31 : x
2. Step 2: Convert to fraction form
   2,429.76/3,644.70 = 786.31/x
3. Step 3: Cross multiply
   2,429.76x = 3,644.70 × 786.31
4. Step 4: Simplify right side
   2,429.76x = 2,865,852.00
5. Step 5: Solve for x
   x = 2,865,852.00/2,429.76
6. Step 6: Final answer
   x = 1,179.48