Finding the Fourth Proportional to 49,111.20, 68,911.20 and 49,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   49,111.20 : 68,911.20 = 49,111.20 : x
2. Step 2: Convert to fraction form
   49,111.20/68,911.20 = 49,111.20/x
3. Step 3: Cross multiply
   49,111.20x = 68,911.20 × 49,111.20
4. Step 4: Simplify right side
   49,111.20x = 3,384,311,725.44
5. Step 5: Solve for x
   x = 3,384,311,725.44/49,111.20
6. Step 6: Final answer
   x = 68,911.20