Finding the Fourth Proportional to 355,768.10, 532,356.15 and 262,456.10

Step by Step Solution

1. Step 1: Write the proportion equation
   355,768.10 : 532,356.15 = 262,456.10 : x
2. Step 2: Convert to fraction form
   355,768.10/532,356.15 = 262,456.10/x
3. Step 3: Cross multiply
   355,768.10x = 532,356.15 × 262,456.10
4. Step 4: Simplify right side
   355,768.10x = 139,720,118,940.02
5. Step 5: Solve for x
   x = 139,720,118,940.02/355,768.10
6. Step 6: Final answer
   x = 392,728.07