Finding the Fourth Proportional to 2,105,990.16, 3,158,994.43 and 666,680.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,990.16 : 3,158,994.43 = 666,680.61 : x
2. Step 2: Convert to fraction form
   2,105,990.16/3,158,994.43 = 666,680.61/x
3. Step 3: Cross multiply
   2,105,990.16x = 3,158,994.43 × 666,680.61
4. Step 4: Simplify right side
   2,105,990.16x = 2,106,040,333,579.00
5. Step 5: Solve for x
   x = 2,106,040,333,579.00/2,105,990.16
6. Step 6: Final answer
   x = 1,000,023.82