Finding the Fourth Proportional to 2,238.50, 3,357.30 and 777.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,238.50 : 3,357.30 = 777.71 : x
2. Step 2: Convert to fraction form
   2,238.50/3,357.30 = 777.71/x
3. Step 3: Cross multiply
   2,238.50x = 3,357.30 × 777.71
4. Step 4: Simplify right side
   2,238.50x = 2,611,005.78
5. Step 5: Solve for x
   x = 2,611,005.78/2,238.50
6. Step 6: Final answer
   x = 1,166.41