Finding the Fourth Proportional to 194,911.50, 268,978.02 and 105,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   194,911.50 : 268,978.02 = 105,487.50 : x
2. Step 2: Convert to fraction form
   194,911.50/268,978.02 = 105,487.50/x
3. Step 3: Cross multiply
   194,911.50x = 268,978.02 × 105,487.50
4. Step 4: Simplify right side
   194,911.50x = 28,373,818,884.75
5. Step 5: Solve for x
   x = 28,373,818,884.75/194,911.50
6. Step 6: Final answer
   x = 145,572.83