Finding the Fourth Proportional to 54,790.48, 82,061.15 and 42,869.96

Step by Step Solution

1. Step 1: Write the proportion equation
   54,790.48 : 82,061.15 = 42,869.96 : x
2. Step 2: Convert to fraction form
   54,790.48/82,061.15 = 42,869.96/x
3. Step 3: Cross multiply
   54,790.48x = 82,061.15 × 42,869.96
4. Step 4: Simplify right side
   54,790.48x = 3,517,958,218.05
5. Step 5: Solve for x
   x = 3,517,958,218.05/54,790.48
6. Step 6: Final answer
   x = 64,207.47