Finding the Fourth Proportional to 1,443,151.74, 2,164,782.69 and 644,439.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443,151.74 : 2,164,782.69 = 644,439.90 : x
2. Step 2: Convert to fraction form
   1,443,151.74/2,164,782.69 = 644,439.90/x
3. Step 3: Cross multiply
   1,443,151.74x = 2,164,782.69 × 644,439.90
4. Step 4: Simplify right side
   1,443,151.74x = 1,395,072,340,265.33
5. Step 5: Solve for x
   x = 1,395,072,340,265.33/1,443,151.74
6. Step 6: Final answer
   x = 966,684.45