Finding the Fourth Proportional to 1,086.34, 1,628.65 and 501.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.34 : 1,628.65 = 501.72 : x
2. Step 2: Convert to fraction form
   1,086.34/1,628.65 = 501.72/x
3. Step 3: Cross multiply
   1,086.34x = 1,628.65 × 501.72
4. Step 4: Simplify right side
   1,086.34x = 817,126.28
5. Step 5: Solve for x
   x = 817,126.28/1,086.34
6. Step 6: Final answer
   x = 752.18