Finding the Fourth Proportional to 2,635.56, 3,953.21 and 786.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,635.56 : 3,953.21 = 786.69 : x
2. Step 2: Convert to fraction form
   2,635.56/3,953.21 = 786.69/x
3. Step 3: Cross multiply
   2,635.56x = 3,953.21 × 786.69
4. Step 4: Simplify right side
   2,635.56x = 3,109,946.84
5. Step 5: Solve for x
   x = 3,109,946.84/2,635.56
6. Step 6: Final answer
   x = 1,179.99