Finding the Fourth Proportional to 1,970.29, 2,719.38 and 1,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.29 : 2,719.38 = 1,131.56 : x
2. Step 2: Convert to fraction form
   1,970.29/2,719.38 = 1,131.56/x
3. Step 3: Cross multiply
   1,970.29x = 2,719.38 × 1,131.56
4. Step 4: Simplify right side
   1,970.29x = 3,077,128.04
5. Step 5: Solve for x
   x = 3,077,128.04/1,970.29
6. Step 6: Final answer
   x = 1,561.77