Finding the Fourth Proportional to 54,490.05, 81,685.56 and 48,585.15

Step by Step Solution

1. Step 1: Write the proportion equation
   54,490.05 : 81,685.56 = 48,585.15 : x
2. Step 2: Convert to fraction form
   54,490.05/81,685.56 = 48,585.15/x
3. Step 3: Cross multiply
   54,490.05x = 81,685.56 × 48,585.15
4. Step 4: Simplify right side
   54,490.05x = 3,968,705,185.43
5. Step 5: Solve for x
   x = 3,968,705,185.43/54,490.05
6. Step 6: Final answer
   x = 72,833.58