Finding the Third Proportional to 1,131.19 and 1,490.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.19 : 1,490.91 = 1,490.91 : x
2. Step 2: Convert to fraction form
   1,131.19/1,490.91 = 1,490.91/x
3. Step 3: Cross multiply
   1,131.19x = 1,490.91 × 1,490.91
4. Step 4: Simplify right side
   1,131.19x = 2,222,801.45
5. Step 5: Solve for x
   x = 2,222,801.45/1,131.19
6. Step 6: Final answer
   x = 1,965.02