Finding the Fourth Proportional to 363,255.53, 501,284.81 and 210,300.18

Step by Step Solution

1. Step 1: Write the proportion equation
   363,255.53 : 501,284.81 = 210,300.18 : x
2. Step 2: Convert to fraction form
   363,255.53/501,284.81 = 210,300.18/x
3. Step 3: Cross multiply
   363,255.53x = 501,284.81 × 210,300.18
4. Step 4: Simplify right side
   363,255.53x = 105,420,284,722.77
5. Step 5: Solve for x
   x = 105,420,284,722.77/363,255.53
6. Step 6: Final answer
   x = 290,209.72