Finding the Fourth Proportional to 115,557.72, 159,453.60 and 64,564.08

Step by Step Solution

1. Step 1: Write the proportion equation
   115,557.72 : 159,453.60 = 64,564.08 : x
2. Step 2: Convert to fraction form
   115,557.72/159,453.60 = 64,564.08/x
3. Step 3: Cross multiply
   115,557.72x = 159,453.60 × 64,564.08
4. Step 4: Simplify right side
   115,557.72x = 10,294,974,986.69
5. Step 5: Solve for x
   x = 10,294,974,986.69/115,557.72
6. Step 6: Final answer
   x = 89,089.46