Finding the Third Proportional to 31,357.13 and 67,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,357.13 : 67,513.50 = 67,513.50 : x
2. Step 2: Convert to fraction form
   31,357.13/67,513.50 = 67,513.50/x
3. Step 3: Cross multiply
   31,357.13x = 67,513.50 × 67,513.50
4. Step 4: Simplify right side
   31,357.13x = 4,558,072,682.25
5. Step 5: Solve for x
   x = 4,558,072,682.25/31,357.13
6. Step 6: Final answer
   x = 145,360.03