Finding the Fourth Proportional to 1,123,418.37, 1,550,327.67 and 639,976.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,418.37 : 1,550,327.67 = 639,976.35 : x
2. Step 2: Convert to fraction form
   1,123,418.37/1,550,327.67 = 639,976.35/x
3. Step 3: Cross multiply
   1,123,418.37x = 1,550,327.67 × 639,976.35
4. Step 4: Simplify right side
   1,123,418.37x = 992,173,043,550.60
5. Step 5: Solve for x
   x = 992,173,043,550.60/1,123,418.37
6. Step 6: Final answer
   x = 883,173.24