Finding the Fourth Proportional to 210,499.25, 290,489.27 and 119,855.25

Step by Step Solution

1. Step 1: Write the proportion equation
   210,499.25 : 290,489.27 = 119,855.25 : x
2. Step 2: Convert to fraction form
   210,499.25/290,489.27 = 119,855.25/x
3. Step 3: Cross multiply
   210,499.25x = 290,489.27 × 119,855.25
4. Step 4: Simplify right side
   210,499.25x = 34,816,663,478.89
5. Step 5: Solve for x
   x = 34,816,663,478.89/210,499.25
6. Step 6: Final answer
   x = 165,400.42