Finding the Third Proportional to 12,740 and 28,072

Step by Step Solution

1. Step 1: Write the proportion equation
   12,740 : 28,072 = 28,072 : x
2. Step 2: Convert to fraction form
   12,740/28,072 = 28,072/x
3. Step 3: Cross multiply
   12,740x = 28,072 × 28,072
4. Step 4: Simplify right side
   12,740x = 788,037,184
5. Step 5: Solve for x
   x = 788,037,184/12,740
6. Step 6: Final answer
   x = 61,855.35