Finding the Fourth Proportional to 663,100.42, 915,066.18 and 368,768.18

Step by Step Solution

1. Step 1: Write the proportion equation
   663,100.42 : 915,066.18 = 368,768.18 : x
2. Step 2: Convert to fraction form
   663,100.42/915,066.18 = 368,768.18/x
3. Step 3: Cross multiply
   663,100.42x = 915,066.18 × 368,768.18
4. Step 4: Simplify right side
   663,100.42x = 337,447,289,778.15
5. Step 5: Solve for x
   x = 337,447,289,778.15/663,100.42
6. Step 6: Final answer
   x = 508,893.19