Finding the Third Proportional to 1,290.47 and 2,135.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.47 : 2,135.02 = 2,135.02 : x
2. Step 2: Convert to fraction form
   1,290.47/2,135.02 = 2,135.02/x
3. Step 3: Cross multiply
   1,290.47x = 2,135.02 × 2,135.02
4. Step 4: Simplify right side
   1,290.47x = 4,558,291.72
5. Step 5: Solve for x
   x = 4,558,291.72/1,290.47
6. Step 6: Final answer
   x = 3,532.28