Finding the Fourth Proportional to 115,293.68, 159,103.32 and 64,992.56

Step by Step Solution

1. Step 1: Write the proportion equation
   115,293.68 : 159,103.32 = 64,992.56 : x
2. Step 2: Convert to fraction form
   115,293.68/159,103.32 = 64,992.56/x
3. Step 3: Cross multiply
   115,293.68x = 159,103.32 × 64,992.56
4. Step 4: Simplify right side
   115,293.68x = 10,340,532,071.30
5. Step 5: Solve for x
   x = 10,340,532,071.30/115,293.68
6. Step 6: Final answer
   x = 89,688.63