Finding the Fourth Proportional to 1,556.37, 2,147.40 and 1,053.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,556.37 : 2,147.40 = 1,053.15 : x
2. Step 2: Convert to fraction form
   1,556.37/2,147.40 = 1,053.15/x
3. Step 3: Cross multiply
   1,556.37x = 2,147.40 × 1,053.15
4. Step 4: Simplify right side
   1,556.37x = 2,261,534.31
5. Step 5: Solve for x
   x = 2,261,534.31/1,556.37
6. Step 6: Final answer
   x = 1,453.08