Finding the Fourth Proportional to 115,890.63, 159,932.60 and 64,903.23

Step by Step Solution

1. Step 1: Write the proportion equation
   115,890.63 : 159,932.60 = 64,903.23 : x
2. Step 2: Convert to fraction form
   115,890.63/159,932.60 = 64,903.23/x
3. Step 3: Cross multiply
   115,890.63x = 159,932.60 × 64,903.23
4. Step 4: Simplify right side
   115,890.63x = 10,380,141,997.78
5. Step 5: Solve for x
   x = 10,380,141,997.78/115,890.63
6. Step 6: Final answer
   x = 89,568.43