Finding the Fourth Proportional to 2,078,399, 3,117,689.34 and 658,559.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078,399 : 3,117,689.34 = 658,559.72 : x
2. Step 2: Convert to fraction form
   2,078,399/3,117,689.34 = 658,559.72/x
3. Step 3: Cross multiply
   2,078,399x = 3,117,689.34 × 658,559.72
4. Step 4: Simplify right side
   2,078,399x = 2,053,184,618,797.38
5. Step 5: Solve for x
   x = 2,053,184,618,797.38/2,078,399
6. Step 6: Final answer
   x = 987,868.36