Finding the Fourth Proportional to 89,978.42, 134,819.54 and 30,781.73

Step by Step Solution

1. Step 1: Write the proportion equation
   89,978.42 : 134,819.54 = 30,781.73 : x
2. Step 2: Convert to fraction form
   89,978.42/134,819.54 = 30,781.73/x
3. Step 3: Cross multiply
   89,978.42x = 134,819.54 × 30,781.73
4. Step 4: Simplify right side
   89,978.42x = 4,149,978,525.10
5. Step 5: Solve for x
   x = 4,149,978,525.10/89,978.42
6. Step 6: Final answer
   x = 46,121.93