Finding the Third Proportional to 21,690 and 29,548.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,690 : 29,548.50 = 29,548.50 : x
2. Step 2: Convert to fraction form
   21,690/29,548.50 = 29,548.50/x
3. Step 3: Cross multiply
   21,690x = 29,548.50 × 29,548.50
4. Step 4: Simplify right side
   21,690x = 873,113,852.25
5. Step 5: Solve for x
   x = 873,113,852.25/21,690
6. Step 6: Final answer
   x = 40,254.21