Finding the Fourth Proportional to 1,778.72, 2,669.34 and 624.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,778.72 : 2,669.34 = 624.56 : x
2. Step 2: Convert to fraction form
   1,778.72/2,669.34 = 624.56/x
3. Step 3: Cross multiply
   1,778.72x = 2,669.34 × 624.56
4. Step 4: Simplify right side
   1,778.72x = 1,667,162.99
5. Step 5: Solve for x
   x = 1,667,162.99/1,778.72
6. Step 6: Final answer
   x = 937.28