Finding the Fourth Proportional to 172,907.40, 238,632.74 and 96,439

Step by Step Solution

1. Step 1: Write the proportion equation
   172,907.40 : 238,632.74 = 96,439 : x
2. Step 2: Convert to fraction form
   172,907.40/238,632.74 = 96,439/x
3. Step 3: Cross multiply
   172,907.40x = 238,632.74 × 96,439
4. Step 4: Simplify right side
   172,907.40x = 23,013,502,812.86
5. Step 5: Solve for x
   x = 23,013,502,812.86/172,907.40
6. Step 6: Final answer
   x = 133,097.27