Finding the Third Proportional to 27,603.28 and 42,821.16

Step by Step Solution

1. Step 1: Write the proportion equation
   27,603.28 : 42,821.16 = 42,821.16 : x
2. Step 2: Convert to fraction form
   27,603.28/42,821.16 = 42,821.16/x
3. Step 3: Cross multiply
   27,603.28x = 42,821.16 × 42,821.16
4. Step 4: Simplify right side
   27,603.28x = 1,833,651,422.59
5. Step 5: Solve for x
   x = 1,833,651,422.59/27,603.28
6. Step 6: Final answer
   x = 66,428.75