Finding the Fourth Proportional to 383,834.82, 574,981.15 and 191,128.70

Step by Step Solution

1. Step 1: Write the proportion equation
   383,834.82 : 574,981.15 = 191,128.70 : x
2. Step 2: Convert to fraction form
   383,834.82/574,981.15 = 191,128.70/x
3. Step 3: Cross multiply
   383,834.82x = 574,981.15 × 191,128.70
4. Step 4: Simplify right side
   383,834.82x = 109,895,399,724.01
5. Step 5: Solve for x
   x = 109,895,399,724.01/383,834.82
6. Step 6: Final answer
   x = 286,309.09