Finding the Fourth Proportional to 290,185.98, 400,474.43 and 162,861.57

Step by Step Solution

1. Step 1: Write the proportion equation
   290,185.98 : 400,474.43 = 162,861.57 : x
2. Step 2: Convert to fraction form
   290,185.98/400,474.43 = 162,861.57/x
3. Step 3: Cross multiply
   290,185.98x = 400,474.43 × 162,861.57
4. Step 4: Simplify right side
   290,185.98x = 65,221,893,600.35
5. Step 5: Solve for x
   x = 65,221,893,600.35/290,185.98
6. Step 6: Final answer
   x = 224,758.94