Finding the Third Proportional to 42,249 and 79,174.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,249 : 79,174.50 = 79,174.50 : x
2. Step 2: Convert to fraction form
   42,249/79,174.50 = 79,174.50/x
3. Step 3: Cross multiply
   42,249x = 79,174.50 × 79,174.50
4. Step 4: Simplify right side
   42,249x = 6,268,601,450.25
5. Step 5: Solve for x
   x = 6,268,601,450.25/42,249
6. Step 6: Final answer
   x = 148,372.78