Finding the Fourth Proportional to 144,429.55, 199,362.89 and 99,257.07

Step by Step Solution

1. Step 1: Write the proportion equation
   144,429.55 : 199,362.89 = 99,257.07 : x
2. Step 2: Convert to fraction form
   144,429.55/199,362.89 = 99,257.07/x
3. Step 3: Cross multiply
   144,429.55x = 199,362.89 × 99,257.07
4. Step 4: Simplify right side
   144,429.55x = 19,788,174,835.03
5. Step 5: Solve for x
   x = 19,788,174,835.03/144,429.55
6. Step 6: Final answer
   x = 137,009.18