Finding the Third Proportional to 1,157.39 and 2,499.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,157.39 : 2,499.89 = 2,499.89 : x
2. Step 2: Convert to fraction form
   1,157.39/2,499.89 = 2,499.89/x
3. Step 3: Cross multiply
   1,157.39x = 2,499.89 × 2,499.89
4. Step 4: Simplify right side
   1,157.39x = 6,249,431.17
5. Step 5: Solve for x
   x = 6,249,431.17/1,157.39
6. Step 6: Final answer
   x = 5,399.57