Finding the Fourth Proportional to 3,431,734.90, 5,142,280.46 and 1,988,839.49

Step by Step Solution

1. Step 1: Write the proportion equation
   3,431,734.90 : 5,142,280.46 = 1,988,839.49 : x
2. Step 2: Convert to fraction form
   3,431,734.90/5,142,280.46 = 1,988,839.49/x
3. Step 3: Cross multiply
   3,431,734.90x = 5,142,280.46 × 1,988,839.49
4. Step 4: Simplify right side
   3,431,734.90x = 10,227,170,472,016.59
5. Step 5: Solve for x
   x = 10,227,170,472,016.59/3,431,734.90
6. Step 6: Final answer
   x = 2,980,174.98