Finding the Third Proportional to 12,987.75 and 28,405.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.75 : 28,405.88 = 28,405.88 : x
2. Step 2: Convert to fraction form
   12,987.75/28,405.88 = 28,405.88/x
3. Step 3: Cross multiply
   12,987.75x = 28,405.88 × 28,405.88
4. Step 4: Simplify right side
   12,987.75x = 806,893,734.52
5. Step 5: Solve for x
   x = 806,893,734.52/12,987.75
6. Step 6: Final answer
   x = 62,127.29