Finding the Fourth Proportional to 172,978.35, 259,465.98 and 54,649.69

Step by Step Solution

1. Step 1: Write the proportion equation
   172,978.35 : 259,465.98 = 54,649.69 : x
2. Step 2: Convert to fraction form
   172,978.35/259,465.98 = 54,649.69/x
3. Step 3: Cross multiply
   172,978.35x = 259,465.98 × 54,649.69
4. Step 4: Simplify right side
   172,978.35x = 14,179,734,928.82
5. Step 5: Solve for x
   x = 14,179,734,928.82/172,978.35
6. Step 6: Final answer
   x = 81,974.04