Finding the Fourth Proportional to 1,970.42, 2,719.43 and 1,131.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,970.42 : 2,719.43 = 1,131.26 : x
2. Step 2: Convert to fraction form
   1,970.42/2,719.43 = 1,131.26/x
3. Step 3: Cross multiply
   1,970.42x = 2,719.43 × 1,131.26
4. Step 4: Simplify right side
   1,970.42x = 3,076,363.13
5. Step 5: Solve for x
   x = 3,076,363.13/1,970.42
6. Step 6: Final answer
   x = 1,561.28