Finding the Fourth Proportional to 1,970.40, 2,718.82 and 1,131.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.40 : 2,718.82 = 1,131.04 : x
2. Step 2: Convert to fraction form
   1,970.40/2,718.82 = 1,131.04/x
3. Step 3: Cross multiply
   1,970.40x = 2,718.82 × 1,131.04
4. Step 4: Simplify right side
   1,970.40x = 3,075,094.17
5. Step 5: Solve for x
   x = 3,075,094.17/1,970.40
6. Step 6: Final answer
   x = 1,560.64