Finding the Fourth Proportional to 2,223.72, 3,336.06 and 762.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.72 : 3,336.06 = 762.91 : x
2. Step 2: Convert to fraction form
   2,223.72/3,336.06 = 762.91/x
3. Step 3: Cross multiply
   2,223.72x = 3,336.06 × 762.91
4. Step 4: Simplify right side
   2,223.72x = 2,545,113.53
5. Step 5: Solve for x
   x = 2,545,113.53/2,223.72
6. Step 6: Final answer
   x = 1,144.53