Finding the Fourth Proportional to 172,068.18, 258,089.49 and 72,224.34

Step by Step Solution

1. Step 1: Write the proportion equation
   172,068.18 : 258,089.49 = 72,224.34 : x
2. Step 2: Convert to fraction form
   172,068.18/258,089.49 = 72,224.34/x
3. Step 3: Cross multiply
   172,068.18x = 258,089.49 × 72,224.34
4. Step 4: Simplify right side
   172,068.18x = 18,640,343,076.19
5. Step 5: Solve for x
   x = 18,640,343,076.19/172,068.18
6. Step 6: Final answer
   x = 108,331.15