Finding the Fourth Proportional to 115,998.89, 160,091.75 and 65,025.39

Step by Step Solution

1. Step 1: Write the proportion equation
   115,998.89 : 160,091.75 = 65,025.39 : x
2. Step 2: Convert to fraction form
   115,998.89/160,091.75 = 65,025.39/x
3. Step 3: Cross multiply
   115,998.89x = 160,091.75 × 65,025.39
4. Step 4: Simplify right side
   115,998.89x = 10,410,028,479.53
5. Step 5: Solve for x
   x = 10,410,028,479.53/115,998.89
6. Step 6: Final answer
   x = 89,742.48