Finding the Fourth Proportional to 290,912.56, 401,456.82 and 163,585.42

Step by Step Solution

1. Step 1: Write the proportion equation
   290,912.56 : 401,456.82 = 163,585.42 : x
2. Step 2: Convert to fraction form
   290,912.56/401,456.82 = 163,585.42/x
3. Step 3: Cross multiply
   290,912.56x = 401,456.82 × 163,585.42
4. Step 4: Simplify right side
   290,912.56x = 65,672,482,511.56
5. Step 5: Solve for x
   x = 65,672,482,511.56/290,912.56
6. Step 6: Final answer
   x = 225,746.47