Finding the Fourth Proportional to 3,208,300.12, 4,812,453.78 and 812,144.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,208,300.12 : 4,812,453.78 = 812,144.82 : x
2. Step 2: Convert to fraction form
   3,208,300.12/4,812,453.78 = 812,144.82/x
3. Step 3: Cross multiply
   3,208,300.12x = 4,812,453.78 × 812,144.82
4. Step 4: Simplify right side
   3,208,300.12x = 3,908,409,408,916.42
5. Step 5: Solve for x
   x = 3,908,409,408,916.42/3,208,300.12
6. Step 6: Final answer
   x = 1,218,218.14