Finding the Fourth Proportional to 287,411.82, 396,638.20 and 166,553.34

Step by Step Solution

1. Step 1: Write the proportion equation
   287,411.82 : 396,638.20 = 166,553.34 : x
2. Step 2: Convert to fraction form
   287,411.82/396,638.20 = 166,553.34/x
3. Step 3: Cross multiply
   287,411.82x = 396,638.20 × 166,553.34
4. Step 4: Simplify right side
   287,411.82x = 66,061,416,981.59
5. Step 5: Solve for x
   x = 66,061,416,981.59/287,411.82
6. Step 6: Final answer
   x = 229,849.34