Finding the Fourth Proportional to 764.56, 1,145.57 and 700.72

Step by Step Solution

1. Step 1: Write the proportion equation
   764.56 : 1,145.57 = 700.72 : x
2. Step 2: Convert to fraction form
   764.56/1,145.57 = 700.72/x
3. Step 3: Cross multiply
   764.56x = 1,145.57 × 700.72
4. Step 4: Simplify right side
   764.56x = 802,724.61
5. Step 5: Solve for x
   x = 802,724.61/764.56
6. Step 6: Final answer
   x = 1,049.92