Finding the Third Proportional to 12,988 and 28,328

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988 : 28,328 = 28,328 : x
2. Step 2: Convert to fraction form
   12,988/28,328 = 28,328/x
3. Step 3: Cross multiply
   12,988x = 28,328 × 28,328
4. Step 4: Simplify right side
   12,988x = 802,475,584
5. Step 5: Solve for x
   x = 802,475,584/12,988
6. Step 6: Final answer
   x = 61,785.92