Finding the Third Proportional to 28,172.81 and 43,603.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,172.81 : 43,603.31 = 43,603.31 : x
2. Step 2: Convert to fraction form
   28,172.81/43,603.31 = 43,603.31/x
3. Step 3: Cross multiply
   28,172.81x = 43,603.31 × 43,603.31
4. Step 4: Simplify right side
   28,172.81x = 1,901,248,860.97
5. Step 5: Solve for x
   x = 1,901,248,860.97/28,172.81
6. Step 6: Final answer
   x = 67,485.23