Finding the Third Proportional to 21,020 and 43,090

Step by Step Solution

1. Step 1: Write the proportion equation
   21,020 : 43,090 = 43,090 : x
2. Step 2: Convert to fraction form
   21,020/43,090 = 43,090/x
3. Step 3: Cross multiply
   21,020x = 43,090 × 43,090
4. Step 4: Simplify right side
   21,020x = 1,856,748,100
5. Step 5: Solve for x
   x = 1,856,748,100/21,020
6. Step 6: Final answer
   x = 88,332.45