Finding the Third Proportional to 12,988.75 and 28,407.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,988.75 : 28,407.25 = 28,407.25 : x
2. Step 2: Convert to fraction form
   12,988.75/28,407.25 = 28,407.25/x
3. Step 3: Cross multiply
   12,988.75x = 28,407.25 × 28,407.25
4. Step 4: Simplify right side
   12,988.75x = 806,971,852.56
5. Step 5: Solve for x
   x = 806,971,852.56/12,988.75
6. Step 6: Final answer
   x = 62,128.52