Finding the Third Proportional to 51,318 and 78,826

Step by Step Solution

1. Step 1: Write the proportion equation
   51,318 : 78,826 = 78,826 : x
2. Step 2: Convert to fraction form
   51,318/78,826 = 78,826/x
3. Step 3: Cross multiply
   51,318x = 78,826 × 78,826
4. Step 4: Simplify right side
   51,318x = 6,213,538,276
5. Step 5: Solve for x
   x = 6,213,538,276/51,318
6. Step 6: Final answer
   x = 121,079.12