Finding the Third Proportional to 31,228.50 and 64,887

Step by Step Solution

1. Step 1: Write the proportion equation
   31,228.50 : 64,887 = 64,887 : x
2. Step 2: Convert to fraction form
   31,228.50/64,887 = 64,887/x
3. Step 3: Cross multiply
   31,228.50x = 64,887 × 64,887
4. Step 4: Simplify right side
   31,228.50x = 4,210,322,769
5. Step 5: Solve for x
   x = 4,210,322,769/31,228.50
6. Step 6: Final answer
   x = 134,823.09