Finding the Third Proportional to 84,321 and 131,422.50

Step by Step Solution

1. Step 1: Write the proportion equation
   84,321 : 131,422.50 = 131,422.50 : x
2. Step 2: Convert to fraction form
   84,321/131,422.50 = 131,422.50/x
3. Step 3: Cross multiply
   84,321x = 131,422.50 × 131,422.50
4. Step 4: Simplify right side
   84,321x = 17,271,873,506.25
5. Step 5: Solve for x
   x = 17,271,873,506.25/84,321
6. Step 6: Final answer
   x = 204,834.78