Finding the Fourth Proportional to 1,200.56, 1,790.37 and 1,148.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.56 : 1,790.37 = 1,148.31 : x
2. Step 2: Convert to fraction form
   1,200.56/1,790.37 = 1,148.31/x
3. Step 3: Cross multiply
   1,200.56x = 1,790.37 × 1,148.31
4. Step 4: Simplify right side
   1,200.56x = 2,055,899.77
5. Step 5: Solve for x
   x = 2,055,899.77/1,200.56
6. Step 6: Final answer
   x = 1,712.46