Finding the Third Proportional to 131,659.50 and 288,321

Step by Step Solution

1. Step 1: Write the proportion equation
   131,659.50 : 288,321 = 288,321 : x
2. Step 2: Convert to fraction form
   131,659.50/288,321 = 288,321/x
3. Step 3: Cross multiply
   131,659.50x = 288,321 × 288,321
4. Step 4: Simplify right side
   131,659.50x = 83,128,999,041
5. Step 5: Solve for x
   x = 83,128,999,041/131,659.50
6. Step 6: Final answer
   x = 631,393.85