Finding the Third Proportional to 28,122.19 and 43,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   28,122.19 : 43,390.69 = 43,390.69 : x
2. Step 2: Convert to fraction form
   28,122.19/43,390.69 = 43,390.69/x
3. Step 3: Cross multiply
   28,122.19x = 43,390.69 × 43,390.69
4. Step 4: Simplify right side
   28,122.19x = 1,882,751,761.72
5. Step 5: Solve for x
   x = 1,882,751,761.72/28,122.19
6. Step 6: Final answer
   x = 66,948.98