Finding the Third Proportional to 21,409.88 and 30,430.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,409.88 : 30,430.13 = 30,430.13 : x
2. Step 2: Convert to fraction form
   21,409.88/30,430.13 = 30,430.13/x
3. Step 3: Cross multiply
   21,409.88x = 30,430.13 × 30,430.13
4. Step 4: Simplify right side
   21,409.88x = 925,992,507.52
5. Step 5: Solve for x
   x = 925,992,507.52/21,409.88
6. Step 6: Final answer
   x = 43,250.72