Finding the Fourth Proportional to 144,258.45, 199,073.75 and 87,688.05

Step by Step Solution

1. Step 1: Write the proportion equation
   144,258.45 : 199,073.75 = 87,688.05 : x
2. Step 2: Convert to fraction form
   144,258.45/199,073.75 = 87,688.05/x
3. Step 3: Cross multiply
   144,258.45x = 199,073.75 × 87,688.05
4. Step 4: Simplify right side
   144,258.45x = 17,456,388,505.25
5. Step 5: Solve for x
   x = 17,456,388,505.25/144,258.45
6. Step 6: Final answer
   x = 121,007.74