Finding the Fourth Proportional to 427,111.38, 640,623.33 and 111,527.28

Step by Step Solution

1. Step 1: Write the proportion equation
   427,111.38 : 640,623.33 = 111,527.28 : x
2. Step 2: Convert to fraction form
   427,111.38/640,623.33 = 111,527.28/x
3. Step 3: Cross multiply
   427,111.38x = 640,623.33 × 111,527.28
4. Step 4: Simplify right side
   427,111.38x = 71,446,977,499.44
5. Step 5: Solve for x
   x = 71,446,977,499.44/427,111.38
6. Step 6: Final answer
   x = 167,279.50