Finding the Fourth Proportional to 663,300.96, 915,358.42 and 376,836.78

Step by Step Solution

1. Step 1: Write the proportion equation
   663,300.96 : 915,358.42 = 376,836.78 : x
2. Step 2: Convert to fraction form
   663,300.96/915,358.42 = 376,836.78/x
3. Step 3: Cross multiply
   663,300.96x = 915,358.42 × 376,836.78
4. Step 4: Simplify right side
   663,300.96x = 344,940,719,538.69
5. Step 5: Solve for x
   x = 344,940,719,538.69/663,300.96
6. Step 6: Final answer
   x = 520,036.51