Finding the Fourth Proportional to 200,842.50, 277,162.66 and 111,418.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,842.50 : 277,162.66 = 111,418.50 : x
2. Step 2: Convert to fraction form
   200,842.50/277,162.66 = 111,418.50/x
3. Step 3: Cross multiply
   200,842.50x = 277,162.66 × 111,418.50
4. Step 4: Simplify right side
   200,842.50x = 30,881,047,833.21
5. Step 5: Solve for x
   x = 30,881,047,833.21/200,842.50
6. Step 6: Final answer
   x = 153,757.54