Finding the Fourth Proportional to 72,282.93, 99,680.45 and 56,361.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,282.93 : 99,680.45 = 56,361.57 : x
2. Step 2: Convert to fraction form
   72,282.93/99,680.45 = 56,361.57/x
3. Step 3: Cross multiply
   72,282.93x = 99,680.45 × 56,361.57
4. Step 4: Simplify right side
   72,282.93x = 5,618,146,660.31
5. Step 5: Solve for x
   x = 5,618,146,660.31/72,282.93
6. Step 6: Final answer
   x = 77,724.39