Finding the Fourth Proportional to 2,060.58, 3,086.76 and 1,278.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,060.58 : 3,086.76 = 1,278.72 : x
2. Step 2: Convert to fraction form
   2,060.58/3,086.76 = 1,278.72/x
3. Step 3: Cross multiply
   2,060.58x = 3,086.76 × 1,278.72
4. Step 4: Simplify right side
   2,060.58x = 3,947,101.75
5. Step 5: Solve for x
   x = 3,947,101.75/2,060.58
6. Step 6: Final answer
   x = 1,915.53