Finding the Fourth Proportional to 1,243.77, 1,713.35 and 1,066.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.77 : 1,713.35 = 1,066.15 : x
2. Step 2: Convert to fraction form
   1,243.77/1,713.35 = 1,066.15/x
3. Step 3: Cross multiply
   1,243.77x = 1,713.35 × 1,066.15
4. Step 4: Simplify right side
   1,243.77x = 1,826,688.10
5. Step 5: Solve for x
   x = 1,826,688.10/1,243.77
6. Step 6: Final answer
   x = 1,468.67