Finding the Fourth Proportional to 2,225.98, 3,337.85 and 764.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,225.98 : 3,337.85 = 764.70 : x
2. Step 2: Convert to fraction form
   2,225.98/3,337.85 = 764.70/x
3. Step 3: Cross multiply
   2,225.98x = 3,337.85 × 764.70
4. Step 4: Simplify right side
   2,225.98x = 2,552,453.90
5. Step 5: Solve for x
   x = 2,552,453.90/2,225.98
6. Step 6: Final answer
   x = 1,146.67