Finding the Third Proportional to 21,356.25 and 31,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,356.25 : 31,210.50 = 31,210.50 : x
2. Step 2: Convert to fraction form
   21,356.25/31,210.50 = 31,210.50/x
3. Step 3: Cross multiply
   21,356.25x = 31,210.50 × 31,210.50
4. Step 4: Simplify right side
   21,356.25x = 974,095,310.25
5. Step 5: Solve for x
   x = 974,095,310.25/21,356.25
6. Step 6: Final answer
   x = 45,611.72