Finding the Third Proportional to 13,686.25 and 29,621.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,686.25 : 29,621.75 = 29,621.75 : x
2. Step 2: Convert to fraction form
   13,686.25/29,621.75 = 29,621.75/x
3. Step 3: Cross multiply
   13,686.25x = 29,621.75 × 29,621.75
4. Step 4: Simplify right side
   13,686.25x = 877,448,073.06
5. Step 5: Solve for x
   x = 877,448,073.06/13,686.25
6. Step 6: Final answer
   x = 64,111.65