Finding the Fourth Proportional to 1,970.16, 2,718.90 and 1,131

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.16 : 2,718.90 = 1,131 : x
2. Step 2: Convert to fraction form
   1,970.16/2,718.90 = 1,131/x
3. Step 3: Cross multiply
   1,970.16x = 2,718.90 × 1,131
4. Step 4: Simplify right side
   1,970.16x = 3,075,075.90
5. Step 5: Solve for x
   x = 3,075,075.90/1,970.16
6. Step 6: Final answer
   x = 1,560.83