Finding the Fourth Proportional to 2,139,018.75, 3,208,497.89 and 519,799.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,018.75 : 3,208,497.89 = 519,799.49 : x
2. Step 2: Convert to fraction form
   2,139,018.75/3,208,497.89 = 519,799.49/x
3. Step 3: Cross multiply
   2,139,018.75x = 3,208,497.89 × 519,799.49
4. Step 4: Simplify right side
   2,139,018.75x = 1,667,775,552,145.09
5. Step 5: Solve for x
   x = 1,667,775,552,145.09/2,139,018.75
6. Step 6: Final answer
   x = 779,691.88