Finding the Third Proportional to 12,988.50 and 28,406.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988.50 : 28,406.50 = 28,406.50 : x
2. Step 2: Convert to fraction form
   12,988.50/28,406.50 = 28,406.50/x
3. Step 3: Cross multiply
   12,988.50x = 28,406.50 × 28,406.50
4. Step 4: Simplify right side
   12,988.50x = 806,929,242.25
5. Step 5: Solve for x
   x = 806,929,242.25/12,988.50
6. Step 6: Final answer
   x = 62,126.44