Finding the Third Proportional to 21,213 and 31,063.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,213 : 31,063.50 = 31,063.50 : x
2. Step 2: Convert to fraction form
   21,213/31,063.50 = 31,063.50/x
3. Step 3: Cross multiply
   21,213x = 31,063.50 × 31,063.50
4. Step 4: Simplify right side
   21,213x = 964,941,032.25
5. Step 5: Solve for x
   x = 964,941,032.25/21,213
6. Step 6: Final answer
   x = 45,488.19