Finding the Third Proportional to 30,907.50 and 66,188.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,907.50 : 66,188.25 = 66,188.25 : x
2. Step 2: Convert to fraction form
   30,907.50/66,188.25 = 66,188.25/x
3. Step 3: Cross multiply
   30,907.50x = 66,188.25 × 66,188.25
4. Step 4: Simplify right side
   30,907.50x = 4,380,884,438.06
5. Step 5: Solve for x
   x = 4,380,884,438.06/30,907.50
6. Step 6: Final answer
   x = 141,741.79