Finding the Fourth Proportional to 2,040.78, 3,061.37 and 653.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.78 : 3,061.37 = 653.76 : x
2. Step 2: Convert to fraction form
   2,040.78/3,061.37 = 653.76/x
3. Step 3: Cross multiply
   2,040.78x = 3,061.37 × 653.76
4. Step 4: Simplify right side
   2,040.78x = 2,001,397.98
5. Step 5: Solve for x
   x = 2,001,397.98/2,040.78
6. Step 6: Final answer
   x = 980.70