Finding the Third Proportional to 20,830.50 and 29,686.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,830.50 : 29,686.50 = 29,686.50 : x
2. Step 2: Convert to fraction form
   20,830.50/29,686.50 = 29,686.50/x
3. Step 3: Cross multiply
   20,830.50x = 29,686.50 × 29,686.50
4. Step 4: Simplify right side
   20,830.50x = 881,288,282.25
5. Step 5: Solve for x
   x = 881,288,282.25/20,830.50
6. Step 6: Final answer
   x = 42,307.59