Finding the Fourth Proportional to 102,864.72, 154,219.32 and 82,076.88

Step by Step Solution

1. Step 1: Write the proportion equation
   102,864.72 : 154,219.32 = 82,076.88 : x
2. Step 2: Convert to fraction form
   102,864.72/154,219.32 = 82,076.88/x
3. Step 3: Cross multiply
   102,864.72x = 154,219.32 × 82,076.88
4. Step 4: Simplify right side
   102,864.72x = 12,657,840,621.32
5. Step 5: Solve for x
   x = 12,657,840,621.32/102,864.72
6. Step 6: Final answer
   x = 123,053.27