Finding the Fourth Proportional to 1,443,056.35, 2,164,921.38 and 418,408.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,056.35 : 2,164,921.38 = 418,408.06 : x
2. Step 2: Convert to fraction form
   1,443,056.35/2,164,921.38 = 418,408.06/x
3. Step 3: Cross multiply
   1,443,056.35x = 2,164,921.38 × 418,408.06
4. Step 4: Simplify right side
   1,443,056.35x = 905,820,554,658.32
5. Step 5: Solve for x
   x = 905,820,554,658.32/1,443,056.35
6. Step 6: Final answer
   x = 627,709.76