Finding the Fourth Proportional to 2,040.86, 3,060.64 and 870.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.86 : 3,060.64 = 870.84 : x
2. Step 2: Convert to fraction form
   2,040.86/3,060.64 = 870.84/x
3. Step 3: Cross multiply
   2,040.86x = 3,060.64 × 870.84
4. Step 4: Simplify right side
   2,040.86x = 2,665,327.74
5. Step 5: Solve for x
   x = 2,665,327.74/2,040.86
6. Step 6: Final answer
   x = 1,305.98