Finding the Fourth Proportional to 503,298.96, 694,554.92 and 288,451.72

Step by Step Solution

1. Step 1: Write the proportion equation
   503,298.96 : 694,554.92 = 288,451.72 : x
2. Step 2: Convert to fraction form
   503,298.96/694,554.92 = 288,451.72/x
3. Step 3: Cross multiply
   503,298.96x = 694,554.92 × 288,451.72
4. Step 4: Simplify right side
   503,298.96x = 200,345,561,308.46
5. Step 5: Solve for x
   x = 200,345,561,308.46/503,298.96
6. Step 6: Final answer
   x = 398,064.72