Finding the Fourth Proportional to 144,829.42, 216,789.72 and 99,586.77

Step by Step Solution

1. Step 1: Write the proportion equation
   144,829.42 : 216,789.72 = 99,586.77 : x
2. Step 2: Convert to fraction form
   144,829.42/216,789.72 = 99,586.77/x
3. Step 3: Cross multiply
   144,829.42x = 216,789.72 × 99,586.77
4. Step 4: Simplify right side
   144,829.42x = 21,589,386,797.59
5. Step 5: Solve for x
   x = 21,589,386,797.59/144,829.42
6. Step 6: Final answer
   x = 149,067.69