Finding the Third Proportional to 1,129.69 and 2,345.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.69 : 2,345.81 = 2,345.81 : x
2. Step 2: Convert to fraction form
   1,129.69/2,345.81 = 2,345.81/x
3. Step 3: Cross multiply
   1,129.69x = 2,345.81 × 2,345.81
4. Step 4: Simplify right side
   1,129.69x = 5,502,836.29
5. Step 5: Solve for x
   x = 5,502,836.29/1,129.69
6. Step 6: Final answer
   x = 4,871.11