Finding the Fourth Proportional to 806,100.32, 1,209,908.04 and 422,124.78

Step by Step Solution

1. Step 1: Write the proportion equation
   806,100.32 : 1,209,908.04 = 422,124.78 : x
2. Step 2: Convert to fraction form
   806,100.32/1,209,908.04 = 422,124.78/x
3. Step 3: Cross multiply
   806,100.32x = 1,209,908.04 × 422,124.78
4. Step 4: Simplify right side
   806,100.32x = 510,732,159,155.69
5. Step 5: Solve for x
   x = 510,732,159,155.69/806,100.32
6. Step 6: Final answer
   x = 633,583.87