Finding the Third Proportional to 27,509.50 and 42,908.50

Step by Step Solution

1. Step 1: Write the proportion equation
   27,509.50 : 42,908.50 = 42,908.50 : x
2. Step 2: Convert to fraction form
   27,509.50/42,908.50 = 42,908.50/x
3. Step 3: Cross multiply
   27,509.50x = 42,908.50 × 42,908.50
4. Step 4: Simplify right side
   27,509.50x = 1,841,139,372.25
5. Step 5: Solve for x
   x = 1,841,139,372.25/27,509.50
6. Step 6: Final answer
   x = 66,927.40