Finding the Fourth Proportional to 502,934.72, 694,068.15 and 288,116.30

Step by Step Solution

1. Step 1: Write the proportion equation
   502,934.72 : 694,068.15 = 288,116.30 : x
2. Step 2: Convert to fraction form
   502,934.72/694,068.15 = 288,116.30/x
3. Step 3: Cross multiply
   502,934.72x = 694,068.15 × 288,116.30
4. Step 4: Simplify right side
   502,934.72x = 199,972,343,855.50
5. Step 5: Solve for x
   x = 199,972,343,855.50/502,934.72
6. Step 6: Final answer
   x = 397,610.94