Finding the Fourth Proportional to 145,978.56, 219,067.20 and 52,493.76

Step by Step Solution

1. Step 1: Write the proportion equation
   145,978.56 : 219,067.20 = 52,493.76 : x
2. Step 2: Convert to fraction form
   145,978.56/219,067.20 = 52,493.76/x
3. Step 3: Cross multiply
   145,978.56x = 219,067.20 × 52,493.76
4. Step 4: Simplify right side
   145,978.56x = 11,499,661,020.67
5. Step 5: Solve for x
   x = 11,499,661,020.67/145,978.56
6. Step 6: Final answer
   x = 78,776.37