Finding the Fourth Proportional to 172,919, 238,628.22 and 93,431

Step by Step Solution

1. Step 1: Write the proportion equation
   172,919 : 238,628.22 = 93,431 : x
2. Step 2: Convert to fraction form
   172,919/238,628.22 = 93,431/x
3. Step 3: Cross multiply
   172,919x = 238,628.22 × 93,431
4. Step 4: Simplify right side
   172,919x = 22,295,273,222.82
5. Step 5: Solve for x
   x = 22,295,273,222.82/172,919
6. Step 6: Final answer
   x = 128,934.78