Finding the Third Proportional to 21,961.13 and 42,828.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,961.13 : 42,828.75 = 42,828.75 : x
2. Step 2: Convert to fraction form
   21,961.13/42,828.75 = 42,828.75/x
3. Step 3: Cross multiply
   21,961.13x = 42,828.75 × 42,828.75
4. Step 4: Simplify right side
   21,961.13x = 1,834,301,826.56
5. Step 5: Solve for x
   x = 1,834,301,826.56/21,961.13
6. Step 6: Final answer
   x = 83,524.95