Finding the Third Proportional to 10,090 and 21,931

Step by Step Solution

1. Step 1: Write the proportion equation
   10,090 : 21,931 = 21,931 : x
2. Step 2: Convert to fraction form
   10,090/21,931 = 21,931/x
3. Step 3: Cross multiply
   10,090x = 21,931 × 21,931
4. Step 4: Simplify right side
   10,090x = 480,968,761
5. Step 5: Solve for x
   x = 480,968,761/10,090
6. Step 6: Final answer
   x = 47,667.87