Finding the Fourth Proportional to 148,997.50, 205,616.55 and 81,929.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,997.50 : 205,616.55 = 81,929.50 : x
2. Step 2: Convert to fraction form
   148,997.50/205,616.55 = 81,929.50/x
3. Step 3: Cross multiply
   148,997.50x = 205,616.55 × 81,929.50
4. Step 4: Simplify right side
   148,997.50x = 16,846,061,133.23
5. Step 5: Solve for x
   x = 16,846,061,133.23/148,997.50
6. Step 6: Final answer
   x = 113,062.71