Finding the Third Proportional to 21,123 and 29,531.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123 : 29,531.25 = 29,531.25 : x
2. Step 2: Convert to fraction form
   21,123/29,531.25 = 29,531.25/x
3. Step 3: Cross multiply
   21,123x = 29,531.25 × 29,531.25
4. Step 4: Simplify right side
   21,123x = 872,094,726.56
5. Step 5: Solve for x
   x = 872,094,726.56/21,123
6. Step 6: Final answer
   x = 41,286.50