Finding the Fourth Proportional to 117,618.57, 162,301.89 and 66,621.12

Step by Step Solution

1. Step 1: Write the proportion equation
   117,618.57 : 162,301.89 = 66,621.12 : x
2. Step 2: Convert to fraction form
   117,618.57/162,301.89 = 66,621.12/x
3. Step 3: Cross multiply
   117,618.57x = 162,301.89 × 66,621.12
4. Step 4: Simplify right side
   117,618.57x = 10,812,733,689.92
5. Step 5: Solve for x
   x = 10,812,733,689.92/117,618.57
6. Step 6: Final answer
   x = 91,930.50