Finding the Fourth Proportional to 1,970.45, 2,719.55 and 1,185.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.45 : 2,719.55 = 1,185.29 : x
2. Step 2: Convert to fraction form
   1,970.45/2,719.55 = 1,185.29/x
3. Step 3: Cross multiply
   1,970.45x = 2,719.55 × 1,185.29
4. Step 4: Simplify right side
   1,970.45x = 3,223,455.42
5. Step 5: Solve for x
   x = 3,223,455.42/1,970.45
6. Step 6: Final answer
   x = 1,635.90