Finding the Fourth Proportional to 117,620.50, 162,316.29 and 64,628.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,620.50 : 162,316.29 = 64,628.50 : x
2. Step 2: Convert to fraction form
   117,620.50/162,316.29 = 64,628.50/x
3. Step 3: Cross multiply
   117,620.50x = 162,316.29 × 64,628.50
4. Step 4: Simplify right side
   117,620.50x = 10,490,258,348.27
5. Step 5: Solve for x
   x = 10,490,258,348.27/117,620.50
6. Step 6: Final answer
   x = 89,187.33