Finding the Fourth Proportional to 1,011.56, 1,517.00 and 395.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.56 : 1,517.00 = 395.10 : x
2. Step 2: Convert to fraction form
   1,011.56/1,517.00 = 395.10/x
3. Step 3: Cross multiply
   1,011.56x = 1,517.00 × 395.10
4. Step 4: Simplify right side
   1,011.56x = 599,364.72
5. Step 5: Solve for x
   x = 599,364.72/1,011.56
6. Step 6: Final answer
   x = 592.52