Finding the Fourth Proportional to 663,443.68, 915,517.72 and 376,924

Step by Step Solution

1. Step 1: Write the proportion equation
   663,443.68 : 915,517.72 = 376,924 : x
2. Step 2: Convert to fraction form
   663,443.68/915,517.72 = 376,924/x
3. Step 3: Cross multiply
   663,443.68x = 915,517.72 × 376,924
4. Step 4: Simplify right side
   663,443.68x = 345,080,601,093.28
5. Step 5: Solve for x
   x = 345,080,601,093.28/663,443.68
6. Step 6: Final answer
   x = 520,135.49