Finding the Fourth Proportional to 1,018.72, 1,528.50 and 470.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.72 : 1,528.50 = 470.56 : x
2. Step 2: Convert to fraction form
   1,018.72/1,528.50 = 470.56/x
3. Step 3: Cross multiply
   1,018.72x = 1,528.50 × 470.56
4. Step 4: Simplify right side
   1,018.72x = 719,250.96
5. Step 5: Solve for x
   x = 719,250.96/1,018.72
6. Step 6: Final answer
   x = 706.03