Finding the Fourth Proportional to 115,275.56, 159,081.49 and 64,974.56

Step by Step Solution

1. Step 1: Write the proportion equation
   115,275.56 : 159,081.49 = 64,974.56 : x
2. Step 2: Convert to fraction form
   115,275.56/159,081.49 = 64,974.56/x
3. Step 3: Cross multiply
   115,275.56x = 159,081.49 × 64,974.56
4. Step 4: Simplify right side
   115,275.56x = 10,336,249,816.89
5. Step 5: Solve for x
   x = 10,336,249,816.89/115,275.56
6. Step 6: Final answer
   x = 89,665.58