Finding the Third Proportional to 27,979.88 and 42,972.75

Step by Step Solution

1. Step 1: Write the proportion equation
   27,979.88 : 42,972.75 = 42,972.75 : x
2. Step 2: Convert to fraction form
   27,979.88/42,972.75 = 42,972.75/x
3. Step 3: Cross multiply
   27,979.88x = 42,972.75 × 42,972.75
4. Step 4: Simplify right side
   27,979.88x = 1,846,657,242.56
5. Step 5: Solve for x
   x = 1,846,657,242.56/27,979.88
6. Step 6: Final answer
   x = 65,999.48