Finding the Third Proportional to 30,783.75 and 66,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,783.75 : 66,373.50 = 66,373.50 : x
2. Step 2: Convert to fraction form
   30,783.75/66,373.50 = 66,373.50/x
3. Step 3: Cross multiply
   30,783.75x = 66,373.50 × 66,373.50
4. Step 4: Simplify right side
   30,783.75x = 4,405,441,502.25
5. Step 5: Solve for x
   x = 4,405,441,502.25/30,783.75
6. Step 6: Final answer
   x = 143,109.32