Finding the Fourth Proportional to 3,990,212, 5,506,492.56 and 2,179,380.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,212 : 5,506,492.56 = 2,179,380.32 : x
2. Step 2: Convert to fraction form
   3,990,212/5,506,492.56 = 2,179,380.32/x
3. Step 3: Cross multiply
   3,990,212x = 5,506,492.56 × 2,179,380.32
4. Step 4: Simplify right side
   3,990,212x = 12,000,741,517,490.42
5. Step 5: Solve for x
   x = 12,000,741,517,490.42/3,990,212
6. Step 6: Final answer
   x = 3,007,544.84