Finding the Fourth Proportional to 1,927.78, 2,659.71 and 1,229.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,927.78 : 2,659.71 = 1,229.02 : x
2. Step 2: Convert to fraction form
   1,927.78/2,659.71 = 1,229.02/x
3. Step 3: Cross multiply
   1,927.78x = 2,659.71 × 1,229.02
4. Step 4: Simplify right side
   1,927.78x = 3,268,836.78
5. Step 5: Solve for x
   x = 3,268,836.78/1,927.78
6. Step 6: Final answer
   x = 1,695.65