Finding the Fourth Proportional to 1,946.72, 2,686.56 and 1,556.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,946.72 : 2,686.56 = 1,556.58 : x
2. Step 2: Convert to fraction form
   1,946.72/2,686.56 = 1,556.58/x
3. Step 3: Cross multiply
   1,946.72x = 2,686.56 × 1,556.58
4. Step 4: Simplify right side
   1,946.72x = 4,181,845.56
5. Step 5: Solve for x
   x = 4,181,845.56/1,946.72
6. Step 6: Final answer
   x = 2,148.15