Finding the Fourth Proportional to 1,986.41, 2,741.31 and 1,147.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.41 : 2,741.31 = 1,147.15 : x
2. Step 2: Convert to fraction form
   1,986.41/2,741.31 = 1,147.15/x
3. Step 3: Cross multiply
   1,986.41x = 2,741.31 × 1,147.15
4. Step 4: Simplify right side
   1,986.41x = 3,144,693.77
5. Step 5: Solve for x
   x = 3,144,693.77/1,986.41
6. Step 6: Final answer
   x = 1,583.10