Finding the Fourth Proportional to 1,970.27, 2,719.11 and 1,131.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.27 : 2,719.11 = 1,131.23 : x
2. Step 2: Convert to fraction form
   1,970.27/2,719.11 = 1,131.23/x
3. Step 3: Cross multiply
   1,970.27x = 2,719.11 × 1,131.23
4. Step 4: Simplify right side
   1,970.27x = 3,075,938.81
5. Step 5: Solve for x
   x = 3,075,938.81/1,970.27
6. Step 6: Final answer
   x = 1,561.18