Finding the Third Proportional to 83,280 and 133,200

Step by Step Solution

1. Step 1: Write the proportion equation
   83,280 : 133,200 = 133,200 : x
2. Step 2: Convert to fraction form
   83,280/133,200 = 133,200/x
3. Step 3: Cross multiply
   83,280x = 133,200 × 133,200
4. Step 4: Simplify right side
   83,280x = 17,742,240,000
5. Step 5: Solve for x
   x = 17,742,240,000/83,280
6. Step 6: Final answer
   x = 213,043.23