Finding the Third Proportional to 1,008.35 and 2,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.35 : 2,139.12 = 2,139.12 : x
2. Step 2: Convert to fraction form
   1,008.35/2,139.12 = 2,139.12/x
3. Step 3: Cross multiply
   1,008.35x = 2,139.12 × 2,139.12
4. Step 4: Simplify right side
   1,008.35x = 4,575,822.34
5. Step 5: Solve for x
   x = 4,575,822.34/1,008.35
6. Step 6: Final answer
   x = 4,537.92