Finding the Fourth Proportional to 78,317.58, 108,078.30 and 42,507.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,317.58 : 108,078.30 = 42,507.54 : x
2. Step 2: Convert to fraction form
   78,317.58/108,078.30 = 42,507.54/x
3. Step 3: Cross multiply
   78,317.58x = 108,078.30 × 42,507.54
4. Step 4: Simplify right side
   78,317.58x = 4,594,142,660.38
5. Step 5: Solve for x
   x = 4,594,142,660.38/78,317.58
6. Step 6: Final answer
   x = 58,660.43