Finding the Third Proportional to 12,507 and 19,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,507 : 19,858.50 = 19,858.50 : x
2. Step 2: Convert to fraction form
   12,507/19,858.50 = 19,858.50/x
3. Step 3: Cross multiply
   12,507x = 19,858.50 × 19,858.50
4. Step 4: Simplify right side
   12,507x = 394,360,022.25
5. Step 5: Solve for x
   x = 394,360,022.25/12,507
6. Step 6: Final answer
   x = 31,531.14