Finding the Third Proportional to 2,890.69 and 4,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,890.69 : 4,130.72 = 4,130.72 : x
2. Step 2: Convert to fraction form
   2,890.69/4,130.72 = 4,130.72/x
3. Step 3: Cross multiply
   2,890.69x = 4,130.72 × 4,130.72
4. Step 4: Simplify right side
   2,890.69x = 17,062,837.39
5. Step 5: Solve for x
   x = 17,062,837.39/2,890.69
6. Step 6: Final answer
   x = 5,902.69