Finding the Fourth Proportional to 2,719.06, 4,076.78 and 987.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,719.06 : 4,076.78 = 987.46 : x
2. Step 2: Convert to fraction form
   2,719.06/4,076.78 = 987.46/x
3. Step 3: Cross multiply
   2,719.06x = 4,076.78 × 987.46
4. Step 4: Simplify right side
   2,719.06x = 4,025,657.18
5. Step 5: Solve for x
   x = 4,025,657.18/2,719.06
6. Step 6: Final answer
   x = 1,480.53