Finding the Third Proportional to 31,200 and 63,858

Step by Step Solution

1. Step 1: Write the proportion equation
   31,200 : 63,858 = 63,858 : x
2. Step 2: Convert to fraction form
   31,200/63,858 = 63,858/x
3. Step 3: Cross multiply
   31,200x = 63,858 × 63,858
4. Step 4: Simplify right side
   31,200x = 4,077,844,164
5. Step 5: Solve for x
   x = 4,077,844,164/31,200
6. Step 6: Final answer
   x = 130,700.13