Finding the Fourth Proportional to 1,992,796.98, 2,989,669.78 and 644,959.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992,796.98 : 2,989,669.78 = 644,959.58 : x
2. Step 2: Convert to fraction form
   1,992,796.98/2,989,669.78 = 644,959.58/x
3. Step 3: Cross multiply
   1,992,796.98x = 2,989,669.78 × 644,959.58
4. Step 4: Simplify right side
   1,992,796.98x = 1,928,216,162,422.69
5. Step 5: Solve for x
   x = 1,928,216,162,422.69/1,992,796.98
6. Step 6: Final answer
   x = 967,592.88