Finding the Fourth Proportional to 50,111.90, 69,138.69 and 28,888.22

Step by Step Solution

1. Step 1: Write the proportion equation
   50,111.90 : 69,138.69 = 28,888.22 : x
2. Step 2: Convert to fraction form
   50,111.90/69,138.69 = 28,888.22/x
3. Step 3: Cross multiply
   50,111.90x = 69,138.69 × 28,888.22
4. Step 4: Simplify right side
   50,111.90x = 1,997,293,687.23
5. Step 5: Solve for x
   x = 1,997,293,687.23/50,111.90
6. Step 6: Final answer
   x = 39,856.67