Finding the Fourth Proportional to 78,317.53, 108,078.29 and 42,507.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78,317.53 : 108,078.29 = 42,507.55 : x
2. Step 2: Convert to fraction form
   78,317.53/108,078.29 = 42,507.55/x
3. Step 3: Cross multiply
   78,317.53x = 108,078.29 × 42,507.55
4. Step 4: Simplify right side
   78,317.53x = 4,594,143,835.25
5. Step 5: Solve for x
   x = 4,594,143,835.25/78,317.53
6. Step 6: Final answer
   x = 58,660.48