Finding the Fourth Proportional to 641,808.72, 885,478.41 and 369,868.05

Step by Step Solution

1. Step 1: Write the proportion equation
   641,808.72 : 885,478.41 = 369,868.05 : x
2. Step 2: Convert to fraction form
   641,808.72/885,478.41 = 369,868.05/x
3. Step 3: Cross multiply
   641,808.72x = 885,478.41 × 369,868.05
4. Step 4: Simplify right side
   641,808.72x = 327,510,172,823.80
5. Step 5: Solve for x
   x = 327,510,172,823.80/641,808.72
6. Step 6: Final answer
   x = 510,292.49