Finding the Fourth Proportional to 675,919.12, 932,976.24 and 389,630.56

Step by Step Solution

1. Step 1: Write the proportion equation
   675,919.12 : 932,976.24 = 389,630.56 : x
2. Step 2: Convert to fraction form
   675,919.12/932,976.24 = 389,630.56/x
3. Step 3: Cross multiply
   675,919.12x = 932,976.24 × 389,630.56
4. Step 4: Simplify right side
   675,919.12x = 363,516,054,857.89
5. Step 5: Solve for x
   x = 363,516,054,857.89/675,919.12
6. Step 6: Final answer
   x = 537,809.99