Finding the Third Proportional to 57,849.19 and 86,538.38

Step by Step Solution

1. Step 1: Write the proportion equation
   57,849.19 : 86,538.38 = 86,538.38 : x
2. Step 2: Convert to fraction form
   57,849.19/86,538.38 = 86,538.38/x
3. Step 3: Cross multiply
   57,849.19x = 86,538.38 × 86,538.38
4. Step 4: Simplify right side
   57,849.19x = 7,488,890,347.64
5. Step 5: Solve for x
   x = 7,488,890,347.64/57,849.19
6. Step 6: Final answer
   x = 129,455.41