Finding the Fourth Proportional to 81,896.76, 112,960.98 and 50,081.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,896.76 : 112,960.98 = 50,081.31 : x
2. Step 2: Convert to fraction form
   81,896.76/112,960.98 = 50,081.31/x
3. Step 3: Cross multiply
   81,896.76x = 112,960.98 × 50,081.31
4. Step 4: Simplify right side
   81,896.76x = 5,657,233,857.28
5. Step 5: Solve for x
   x = 5,657,233,857.28/81,896.76
6. Step 6: Final answer
   x = 69,077.63