Finding the Fourth Proportional to 1,018.69, 1,528.72 and 470.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.69 : 1,528.72 = 470.88 : x
2. Step 2: Convert to fraction form
   1,018.69/1,528.72 = 470.88/x
3. Step 3: Cross multiply
   1,018.69x = 1,528.72 × 470.88
4. Step 4: Simplify right side
   1,018.69x = 719,842.50
5. Step 5: Solve for x
   x = 719,842.50/1,018.69
6. Step 6: Final answer
   x = 706.64