Finding the Fourth Proportional to 201,766.21, 278,426.27 and 111,105.05

Step by Step Solution

1. Step 1: Write the proportion equation
   201,766.21 : 278,426.27 = 111,105.05 : x
2. Step 2: Convert to fraction form
   201,766.21/278,426.27 = 111,105.05/x
3. Step 3: Cross multiply
   201,766.21x = 278,426.27 × 111,105.05
4. Step 4: Simplify right side
   201,766.21x = 30,934,563,535.29
5. Step 5: Solve for x
   x = 30,934,563,535.29/201,766.21
6. Step 6: Final answer
   x = 153,318.85