Finding the Fourth Proportional to 144,309.57, 199,018.24 and 90,599.59

Step by Step Solution

1. Step 1: Write the proportion equation
   144,309.57 : 199,018.24 = 90,599.59 : x
2. Step 2: Convert to fraction form
   144,309.57/199,018.24 = 90,599.59/x
3. Step 3: Cross multiply
   144,309.57x = 199,018.24 × 90,599.59
4. Step 4: Simplify right side
   144,309.57x = 18,030,970,946.52
5. Step 5: Solve for x
   x = 18,030,970,946.52/144,309.57
6. Step 6: Final answer
   x = 124,946.47