Finding the Fourth Proportional to 1,970.66, 2,719.61 and 1,131.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.66 : 2,719.61 = 1,131.35 : x
2. Step 2: Convert to fraction form
   1,970.66/2,719.61 = 1,131.35/x
3. Step 3: Cross multiply
   1,970.66x = 2,719.61 × 1,131.35
4. Step 4: Simplify right side
   1,970.66x = 3,076,831.92
5. Step 5: Solve for x
   x = 3,076,831.92/1,970.66
6. Step 6: Final answer
   x = 1,561.32