Finding the Fourth Proportional to 172,992.50, 238,688.98 and 105,007.79

Step by Step Solution

1. Step 1: Write the proportion equation
   172,992.50 : 238,688.98 = 105,007.79 : x
2. Step 2: Convert to fraction form
   172,992.50/238,688.98 = 105,007.79/x
3. Step 3: Cross multiply
   172,992.50x = 238,688.98 × 105,007.79
4. Step 4: Simplify right side
   172,992.50x = 25,064,200,831.19
5. Step 5: Solve for x
   x = 25,064,200,831.19/172,992.50
6. Step 6: Final answer
   x = 144,886.05