Finding the Fourth Proportional to 172,981.62, 259,483.37 and 73,123.20

Step by Step Solution

1. Step 1: Write the proportion equation
   172,981.62 : 259,483.37 = 73,123.20 : x
2. Step 2: Convert to fraction form
   172,981.62/259,483.37 = 73,123.20/x
3. Step 3: Cross multiply
   172,981.62x = 259,483.37 × 73,123.20
4. Step 4: Simplify right side
   172,981.62x = 18,974,253,995.57
5. Step 5: Solve for x
   x = 18,974,253,995.57/172,981.62
6. Step 6: Final answer
   x = 109,689.42