Finding the Third Proportional to 28,700 and 60,820

Step by Step Solution

1. Step 1: Write the proportion equation
   28,700 : 60,820 = 60,820 : x
2. Step 2: Convert to fraction form
   28,700/60,820 = 60,820/x
3. Step 3: Cross multiply
   28,700x = 60,820 × 60,820
4. Step 4: Simplify right side
   28,700x = 3,699,072,400
5. Step 5: Solve for x
   x = 3,699,072,400/28,700
6. Step 6: Final answer
   x = 128,887.54