Finding the Third Proportional to 30,120 and 63,631.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,120 : 63,631.50 = 63,631.50 : x
2. Step 2: Convert to fraction form
   30,120/63,631.50 = 63,631.50/x
3. Step 3: Cross multiply
   30,120x = 63,631.50 × 63,631.50
4. Step 4: Simplify right side
   30,120x = 4,048,967,792.25
5. Step 5: Solve for x
   x = 4,048,967,792.25/30,120
6. Step 6: Final answer
   x = 134,427.88