Finding the Fourth Proportional to 78,538.68, 108,380.22 and 42,728.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,538.68 : 108,380.22 = 42,728.84 : x
2. Step 2: Convert to fraction form
   78,538.68/108,380.22 = 42,728.84/x
3. Step 3: Cross multiply
   78,538.68x = 108,380.22 × 42,728.84
4. Step 4: Simplify right side
   78,538.68x = 4,630,961,079.54
5. Step 5: Solve for x
   x = 4,630,961,079.54/78,538.68
6. Step 6: Final answer
   x = 58,964.08