Finding the Fourth Proportional to 3,208,300.38, 4,812,454.17 and 812,144.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,208,300.38 : 4,812,454.17 = 812,144.88 : x
2. Step 2: Convert to fraction form
   3,208,300.38/4,812,454.17 = 812,144.88/x
3. Step 3: Cross multiply
   3,208,300.38x = 4,812,454.17 × 812,144.88
4. Step 4: Simplify right side
   3,208,300.38x = 3,908,410,014,400.15
5. Step 5: Solve for x
   x = 3,908,410,014,400.15/3,208,300.38
6. Step 6: Final answer
   x = 1,218,218.23