Finding the Fourth Proportional to 1,768.72, 2,653.32 and 614.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.72 : 2,653.32 = 614.56 : x
2. Step 2: Convert to fraction form
   1,768.72/2,653.32 = 614.56/x
3. Step 3: Cross multiply
   1,768.72x = 2,653.32 × 614.56
4. Step 4: Simplify right side
   1,768.72x = 1,630,624.34
5. Step 5: Solve for x
   x = 1,630,624.34/1,768.72
6. Step 6: Final answer
   x = 921.92