Finding the Fourth Proportional to 117,721.35, 162,453.55 and 64,007.72

Step by Step Solution

1. Step 1: Write the proportion equation
   117,721.35 : 162,453.55 = 64,007.72 : x
2. Step 2: Convert to fraction form
   117,721.35/162,453.55 = 64,007.72/x
3. Step 3: Cross multiply
   117,721.35x = 162,453.55 × 64,007.72
4. Step 4: Simplify right side
   117,721.35x = 10,398,281,098.33
5. Step 5: Solve for x
   x = 10,398,281,098.33/117,721.35
6. Step 6: Final answer
   x = 88,329.61