Finding the Fourth Proportional to 117,819.36, 162,591.42 and 64,104.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,819.36 : 162,591.42 = 64,104.78 : x
2. Step 2: Convert to fraction form
   117,819.36/162,591.42 = 64,104.78/x
3. Step 3: Cross multiply
   117,819.36x = 162,591.42 × 64,104.78
4. Step 4: Simplify right side
   117,819.36x = 10,422,887,208.99
5. Step 5: Solve for x
   x = 10,422,887,208.99/117,819.36
6. Step 6: Final answer
   x = 88,464.98