Finding the Fourth Proportional to 428,895.27, 643,155.98 and 144,532.82

Step by Step Solution

1. Step 1: Write the proportion equation
   428,895.27 : 643,155.98 = 144,532.82 : x
2. Step 2: Convert to fraction form
   428,895.27/643,155.98 = 144,532.82/x
3. Step 3: Cross multiply
   428,895.27x = 643,155.98 × 144,532.82
4. Step 4: Simplify right side
   428,895.27x = 92,957,143,550.82
5. Step 5: Solve for x
   x = 92,957,143,550.82/428,895.27
6. Step 6: Final answer
   x = 216,736.23