Finding the Fourth Proportional to 172,978.48, 259,389.76 and 73,087.26

Step by Step Solution

1. Step 1: Write the proportion equation
   172,978.48 : 259,389.76 = 73,087.26 : x
2. Step 2: Convert to fraction form
   172,978.48/259,389.76 = 73,087.26/x
3. Step 3: Cross multiply
   172,978.48x = 259,389.76 × 73,087.26
4. Step 4: Simplify right side
   172,978.48x = 18,958,086,830.46
5. Step 5: Solve for x
   x = 18,958,086,830.46/172,978.48
6. Step 6: Final answer
   x = 109,597.95