Finding the Fourth Proportional to 144,660.29, 199,498.01 and 99,258.17

Step by Step Solution

1. Step 1: Write the proportion equation
   144,660.29 : 199,498.01 = 99,258.17 : x
2. Step 2: Convert to fraction form
   144,660.29/199,498.01 = 99,258.17/x
3. Step 3: Cross multiply
   144,660.29x = 199,498.01 × 99,258.17
4. Step 4: Simplify right side
   144,660.29x = 19,801,805,897.46
5. Step 5: Solve for x
   x = 19,801,805,897.46/144,660.29
6. Step 6: Final answer
   x = 136,884.88