Finding the Third Proportional to 10,123.42 and 21,630.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.42 : 21,630.80 = 21,630.80 : x
2. Step 2: Convert to fraction form
   10,123.42/21,630.80 = 21,630.80/x
3. Step 3: Cross multiply
   10,123.42x = 21,630.80 × 21,630.80
4. Step 4: Simplify right side
   10,123.42x = 467,891,373.45
5. Step 5: Solve for x
   x = 467,891,373.45/10,123.42
6. Step 6: Final answer
   x = 46,218.72