Finding the Fourth Proportional to 194,711.50, 268,701.89 and 105,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   194,711.50 : 268,701.89 = 105,287.50 : x
2. Step 2: Convert to fraction form
   194,711.50/268,701.89 = 105,287.50/x
3. Step 3: Cross multiply
   194,711.50x = 268,701.89 × 105,287.50
4. Step 4: Simplify right side
   194,711.50x = 28,290,950,243.38
5. Step 5: Solve for x
   x = 28,290,950,243.38/194,711.50
6. Step 6: Final answer
   x = 145,296.76