Finding the Fourth Proportional to 115,904.75, 159,940.82 and 64,218.39

Step by Step Solution

1. Step 1: Write the proportion equation
   115,904.75 : 159,940.82 = 64,218.39 : x
2. Step 2: Convert to fraction form
   115,904.75/159,940.82 = 64,218.39/x
3. Step 3: Cross multiply
   115,904.75x = 159,940.82 × 64,218.39
4. Step 4: Simplify right side
   115,904.75x = 10,271,141,634.59
5. Step 5: Solve for x
   x = 10,271,141,634.59/115,904.75
6. Step 6: Final answer
   x = 88,617.09