Finding the Fourth Proportional to 2,040.93, 3,061.78 and 870.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.93 : 3,061.78 = 870.91 : x
2. Step 2: Convert to fraction form
   2,040.93/3,061.78 = 870.91/x
3. Step 3: Cross multiply
   2,040.93x = 3,061.78 × 870.91
4. Step 4: Simplify right side
   2,040.93x = 2,666,534.82
5. Step 5: Solve for x
   x = 2,666,534.82/2,040.93
6. Step 6: Final answer
   x = 1,306.53