Finding the Fourth Proportional to 1,422.51, 2,131.29 and 1,164.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.51 : 2,131.29 = 1,164.12 : x
2. Step 2: Convert to fraction form
   1,422.51/2,131.29 = 1,164.12/x
3. Step 3: Cross multiply
   1,422.51x = 2,131.29 × 1,164.12
4. Step 4: Simplify right side
   1,422.51x = 2,481,077.31
5. Step 5: Solve for x
   x = 2,481,077.31/1,422.51
6. Step 6: Final answer
   x = 1,744.15