Finding the Fourth Proportional to 1,320,902.69, 1,981,188.63 and 422,269.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,902.69 : 1,981,188.63 = 422,269.88 : x
2. Step 2: Convert to fraction form
   1,320,902.69/1,981,188.63 = 422,269.88/x
3. Step 3: Cross multiply
   1,320,902.69x = 1,981,188.63 × 422,269.88
4. Step 4: Simplify right side
   1,320,902.69x = 836,596,275,141.52
5. Step 5: Solve for x
   x = 836,596,275,141.52/1,320,902.69
6. Step 6: Final answer
   x = 633,351.94