Finding the Third Proportional to 65,173.78 and 142,801.31

Step by Step Solution

1. Step 1: Write the proportion equation
   65,173.78 : 142,801.31 = 142,801.31 : x
2. Step 2: Convert to fraction form
   65,173.78/142,801.31 = 142,801.31/x
3. Step 3: Cross multiply
   65,173.78x = 142,801.31 × 142,801.31
4. Step 4: Simplify right side
   65,173.78x = 20,392,214,851.72
5. Step 5: Solve for x
   x = 20,392,214,851.72/65,173.78
6. Step 6: Final answer
   x = 312,889.85