Finding the Fourth Proportional to 1,321,589.52, 1,981,414.64 and 422,513.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,321,589.52 : 1,981,414.64 = 422,513.82 : x
2. Step 2: Convert to fraction form
   1,321,589.52/1,981,414.64 = 422,513.82/x
3. Step 3: Cross multiply
   1,321,589.52x = 1,981,414.64 × 422,513.82
4. Step 4: Simplify right side
   1,321,589.52x = 837,175,069,606.61
5. Step 5: Solve for x
   x = 837,175,069,606.61/1,321,589.52
6. Step 6: Final answer
   x = 633,460.74