Finding the Fourth Proportional to 172,827, 259,342.56 and 72,980.73

Step by Step Solution

1. Step 1: Write the proportion equation
   172,827 : 259,342.56 = 72,980.73 : x
2. Step 2: Convert to fraction form
   172,827/259,342.56 = 72,980.73/x
3. Step 3: Cross multiply
   172,827x = 259,342.56 × 72,980.73
4. Step 4: Simplify right side
   172,827x = 18,927,009,348.87
5. Step 5: Solve for x
   x = 18,927,009,348.87/172,827
6. Step 6: Final answer
   x = 109,514.19