Finding the Fourth Proportional to 290,315.82, 400,625.55 and 162,996.78

Step by Step Solution

1. Step 1: Write the proportion equation
   290,315.82 : 400,625.55 = 162,996.78 : x
2. Step 2: Convert to fraction form
   290,315.82/400,625.55 = 162,996.78/x
3. Step 3: Cross multiply
   290,315.82x = 400,625.55 × 162,996.78
4. Step 4: Simplify right side
   290,315.82x = 65,300,674,635.73
5. Step 5: Solve for x
   x = 65,300,674,635.73/290,315.82
6. Step 6: Final answer
   x = 224,929.78