Finding the Fourth Proportional to 663,112.89, 915,083.46 and 368,780.67

Step by Step Solution

1. Step 1: Write the proportion equation
   663,112.89 : 915,083.46 = 368,780.67 : x
2. Step 2: Convert to fraction form
   663,112.89/915,083.46 = 368,780.67/x
3. Step 3: Cross multiply
   663,112.89x = 915,083.46 × 368,780.67
4. Step 4: Simplify right side
   663,112.89x = 337,465,091,484.72
5. Step 5: Solve for x
   x = 337,465,091,484.72/663,112.89
6. Step 6: Final answer
   x = 508,910.47