Finding the Third Proportional to 8,430.75 and 13,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,430.75 : 13,111.88 = 13,111.88 : x
2. Step 2: Convert to fraction form
   8,430.75/13,111.88 = 13,111.88/x
3. Step 3: Cross multiply
   8,430.75x = 13,111.88 × 13,111.88
4. Step 4: Simplify right side
   8,430.75x = 171,921,266.02
5. Step 5: Solve for x
   x = 171,921,266.02/8,430.75
6. Step 6: Final answer
   x = 20,392.17