Finding the Third Proportional to 27,890.63 and 42,489.56

Step by Step Solution

1. Step 1: Write the proportion equation
   27,890.63 : 42,489.56 = 42,489.56 : x
2. Step 2: Convert to fraction form
   27,890.63/42,489.56 = 42,489.56/x
3. Step 3: Cross multiply
   27,890.63x = 42,489.56 × 42,489.56
4. Step 4: Simplify right side
   27,890.63x = 1,805,362,921.44
5. Step 5: Solve for x
   x = 1,805,362,921.44/27,890.63
6. Step 6: Final answer
   x = 64,730.10