Finding the Fourth Proportional to 1,010.52, 1,516.18 and 394.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.52 : 1,516.18 = 394.41 : x
2. Step 2: Convert to fraction form
   1,010.52/1,516.18 = 394.41/x
3. Step 3: Cross multiply
   1,010.52x = 1,516.18 × 394.41
4. Step 4: Simplify right side
   1,010.52x = 597,996.55
5. Step 5: Solve for x
   x = 597,996.55/1,010.52
6. Step 6: Final answer
   x = 591.77