Finding the Third Proportional to 21,182.77 and 30,978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,182.77 : 30,978.70 = 30,978.70 : x
2. Step 2: Convert to fraction form
   21,182.77/30,978.70 = 30,978.70/x
3. Step 3: Cross multiply
   21,182.77x = 30,978.70 × 30,978.70
4. Step 4: Simplify right side
   21,182.77x = 959,680,047.31
5. Step 5: Solve for x
   x = 959,680,047.31/21,182.77
6. Step 6: Final answer
   x = 45,304.76