Finding the Fourth Proportional to 132,978.36, 199,350.84 and 54,158.88

Step by Step Solution

1. Step 1: Write the proportion equation
   132,978.36 : 199,350.84 = 54,158.88 : x
2. Step 2: Convert to fraction form
   132,978.36/199,350.84 = 54,158.88/x
3. Step 3: Cross multiply
   132,978.36x = 199,350.84 × 54,158.88
4. Step 4: Simplify right side
   132,978.36x = 10,796,618,221.46
5. Step 5: Solve for x
   x = 10,796,618,221.46/132,978.36
6. Step 6: Final answer
   x = 81,190.79