Finding the Third Proportional to 51,030 and 78,804

Step by Step Solution

1. Step 1: Write the proportion equation
   51,030 : 78,804 = 78,804 : x
2. Step 2: Convert to fraction form
   51,030/78,804 = 78,804/x
3. Step 3: Cross multiply
   51,030x = 78,804 × 78,804
4. Step 4: Simplify right side
   51,030x = 6,210,070,416
5. Step 5: Solve for x
   x = 6,210,070,416/51,030
6. Step 6: Final answer
   x = 121,694.50