Finding the Fourth Proportional to 81,996.16, 122,838.72 and 48,645.76

Step by Step Solution

1. Step 1: Write the proportion equation
   81,996.16 : 122,838.72 = 48,645.76 : x
2. Step 2: Convert to fraction form
   81,996.16/122,838.72 = 48,645.76/x
3. Step 3: Cross multiply
   81,996.16x = 122,838.72 × 48,645.76
4. Step 4: Simplify right side
   81,996.16x = 5,975,582,891.83
5. Step 5: Solve for x
   x = 5,975,582,891.83/81,996.16
6. Step 6: Final answer
   x = 72,876.37