Finding the Third Proportional to 21,328.31 and 31,445.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,328.31 : 31,445.72 = 31,445.72 : x
2. Step 2: Convert to fraction form
   21,328.31/31,445.72 = 31,445.72/x
3. Step 3: Cross multiply
   21,328.31x = 31,445.72 × 31,445.72
4. Step 4: Simplify right side
   21,328.31x = 988,833,227.70
5. Step 5: Solve for x
   x = 988,833,227.70/21,328.31
6. Step 6: Final answer
   x = 46,362.47