Finding the Fourth Proportional to 81,938.51, 113,048.74 and 49,686.06

Step by Step Solution

1. Step 1: Write the proportion equation
   81,938.51 : 113,048.74 = 49,686.06 : x
2. Step 2: Convert to fraction form
   81,938.51/113,048.74 = 49,686.06/x
3. Step 3: Cross multiply
   81,938.51x = 113,048.74 × 49,686.06
4. Step 4: Simplify right side
   81,938.51x = 5,616,946,478.56
5. Step 5: Solve for x
   x = 5,616,946,478.56/81,938.51
6. Step 6: Final answer
   x = 68,550.75