Finding the Fourth Proportional to 663,416.16, 914,790.72 and 448,182.48

Step by Step Solution

1. Step 1: Write the proportion equation
   663,416.16 : 914,790.72 = 448,182.48 : x
2. Step 2: Convert to fraction form
   663,416.16/914,790.72 = 448,182.48/x
3. Step 3: Cross multiply
   663,416.16x = 914,790.72 × 448,182.48
4. Step 4: Simplify right side
   663,416.16x = 409,993,173,570.59
5. Step 5: Solve for x
   x = 409,993,173,570.59/663,416.16
6. Step 6: Final answer
   x = 618,002.99