Finding the Fourth Proportional to 1,971.09, 2,719.74 and 1,185.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,971.09 : 2,719.74 = 1,185.15 : x
2. Step 2: Convert to fraction form
   1,971.09/2,719.74 = 1,185.15/x
3. Step 3: Cross multiply
   1,971.09x = 2,719.74 × 1,185.15
4. Step 4: Simplify right side
   1,971.09x = 3,223,299.86
5. Step 5: Solve for x
   x = 3,223,299.86/1,971.09
6. Step 6: Final answer
   x = 1,635.29