Finding the Fourth Proportional to 1,970.89, 2,719.94 and 1,131.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.89 : 2,719.94 = 1,131.59 : x
2. Step 2: Convert to fraction form
   1,970.89/2,719.94 = 1,131.59/x
3. Step 3: Cross multiply
   1,970.89x = 2,719.94 × 1,131.59
4. Step 4: Simplify right side
   1,970.89x = 3,077,858.05
5. Step 5: Solve for x
   x = 3,077,858.05/1,970.89
6. Step 6: Final answer
   x = 1,561.66