Finding the Third Proportional to 65,783.67 and 142,090.45

Step by Step Solution

1. Step 1: Write the proportion equation
   65,783.67 : 142,090.45 = 142,090.45 : x
2. Step 2: Convert to fraction form
   65,783.67/142,090.45 = 142,090.45/x
3. Step 3: Cross multiply
   65,783.67x = 142,090.45 × 142,090.45
4. Step 4: Simplify right side
   65,783.67x = 20,189,696,869.27
5. Step 5: Solve for x
   x = 20,189,696,869.27/65,783.67
6. Step 6: Final answer
   x = 306,910.46