Finding the Fourth Proportional to 144,661.30, 199,499.37 and 99,259.18

Step by Step Solution

1. Step 1: Write the proportion equation
   144,661.30 : 199,499.37 = 99,259.18 : x
2. Step 2: Convert to fraction form
   144,661.30/199,499.37 = 99,259.18/x
3. Step 3: Cross multiply
   144,661.30x = 199,499.37 × 99,259.18
4. Step 4: Simplify right side
   144,661.30x = 19,802,143,876.72
5. Step 5: Solve for x
   x = 19,802,143,876.72/144,661.30
6. Step 6: Final answer
   x = 136,886.26