Finding the Fourth Proportional to 54,816.42, 82,142.28 and 42,317.58

Step by Step Solution

1. Step 1: Write the proportion equation
   54,816.42 : 82,142.28 = 42,317.58 : x
2. Step 2: Convert to fraction form
   54,816.42/82,142.28 = 42,317.58/x
3. Step 3: Cross multiply
   54,816.42x = 82,142.28 × 42,317.58
4. Step 4: Simplify right side
   54,816.42x = 3,476,062,505.28
5. Step 5: Solve for x
   x = 3,476,062,505.28/54,816.42
6. Step 6: Final answer
   x = 63,412.80