Finding the Fourth Proportional to 1,123,200.18, 1,549,993.46 and 613,906.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,200.18 : 1,549,993.46 = 613,906.20 : x
2. Step 2: Convert to fraction form
   1,123,200.18/1,549,993.46 = 613,906.20/x
3. Step 3: Cross multiply
   1,123,200.18x = 1,549,993.46 × 613,906.20
4. Step 4: Simplify right side
   1,123,200.18x = 951,550,591,983.92
5. Step 5: Solve for x
   x = 951,550,591,983.92/1,123,200.18
6. Step 6: Final answer
   x = 847,178.10