Finding the Fourth Proportional to 2,055.19, 2,836.70 and 1,258.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.19 : 2,836.70 = 1,258.78 : x
2. Step 2: Convert to fraction form
   2,055.19/2,836.70 = 1,258.78/x
3. Step 3: Cross multiply
   2,055.19x = 2,836.70 × 1,258.78
4. Step 4: Simplify right side
   2,055.19x = 3,570,781.23
5. Step 5: Solve for x
   x = 3,570,781.23/2,055.19
6. Step 6: Final answer
   x = 1,737.45