Finding the Third Proportional to 21,018.91 and 35,031.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,018.91 : 35,031.51 = 35,031.51 : x
2. Step 2: Convert to fraction form
   21,018.91/35,031.51 = 35,031.51/x
3. Step 3: Cross multiply
   21,018.91x = 35,031.51 × 35,031.51
4. Step 4: Simplify right side
   21,018.91x = 1,227,206,779.09
5. Step 5: Solve for x
   x = 1,227,206,779.09/21,018.91
6. Step 6: Final answer
   x = 58,385.85