Finding the Fourth Proportional to 117,986.43, 162,821 and 64,271.31

Step by Step Solution

1. Step 1: Write the proportion equation
   117,986.43 : 162,821 = 64,271.31 : x
2. Step 2: Convert to fraction form
   117,986.43/162,821 = 64,271.31/x
3. Step 3: Cross multiply
   117,986.43x = 162,821 × 64,271.31
4. Step 4: Simplify right side
   117,986.43x = 10,464,718,965.51
5. Step 5: Solve for x
   x = 10,464,718,965.51/117,986.43
6. Step 6: Final answer
   x = 88,694.26