Finding the Third Proportional to 103,078 and 139,819

Step by Step Solution

1. Step 1: Write the proportion equation
   103,078 : 139,819 = 139,819 : x
2. Step 2: Convert to fraction form
   103,078/139,819 = 139,819/x
3. Step 3: Cross multiply
   103,078x = 139,819 × 139,819
4. Step 4: Simplify right side
   103,078x = 19,549,352,761
5. Step 5: Solve for x
   x = 19,549,352,761/103,078
6. Step 6: Final answer
   x = 189,655.92