Finding the Fourth Proportional to 378,932.59, 522,925.59 and 209,165.50

Step by Step Solution

1. Step 1: Write the proportion equation
   378,932.59 : 522,925.59 = 209,165.50 : x
2. Step 2: Convert to fraction form
   378,932.59/522,925.59 = 209,165.50/x
3. Step 3: Cross multiply
   378,932.59x = 522,925.59 × 209,165.50
4. Step 4: Simplify right side
   378,932.59x = 109,377,992,495.15
5. Step 5: Solve for x
   x = 109,377,992,495.15/378,932.59
6. Step 6: Final answer
   x = 288,647.63