Finding the Third Proportional to 21,359.81 and 31,866.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,359.81 : 31,866.47 = 31,866.47 : x
2. Step 2: Convert to fraction form
   21,359.81/31,866.47 = 31,866.47/x
3. Step 3: Cross multiply
   21,359.81x = 31,866.47 × 31,866.47
4. Step 4: Simplify right side
   21,359.81x = 1,015,471,830.59
5. Step 5: Solve for x
   x = 1,015,471,830.59/21,359.81
6. Step 6: Final answer
   x = 47,541.23