Finding the Fourth Proportional to 743,978.64, 1,116,111.60 and 317,508.24

Step by Step Solution

1. Step 1: Write the proportion equation
   743,978.64 : 1,116,111.60 = 317,508.24 : x
2. Step 2: Convert to fraction form
   743,978.64/1,116,111.60 = 317,508.24/x
3. Step 3: Cross multiply
   743,978.64x = 1,116,111.60 × 317,508.24
4. Step 4: Simplify right side
   743,978.64x = 354,374,629,759.58
5. Step 5: Solve for x
   x = 354,374,629,759.58/743,978.64
6. Step 6: Final answer
   x = 476,323.66