Finding the Fourth Proportional to 1,965.72, 2,712.63 and 1,158.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.72 : 2,712.63 = 1,158.18 : x
2. Step 2: Convert to fraction form
   1,965.72/2,712.63 = 1,158.18/x
3. Step 3: Cross multiply
   1,965.72x = 2,712.63 × 1,158.18
4. Step 4: Simplify right side
   1,965.72x = 3,141,713.81
5. Step 5: Solve for x
   x = 3,141,713.81/1,965.72
6. Step 6: Final answer
   x = 1,598.25