Finding the Third Proportional to 51,787.25 and 79,970.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,787.25 : 79,970.50 = 79,970.50 : x
2. Step 2: Convert to fraction form
   51,787.25/79,970.50 = 79,970.50/x
3. Step 3: Cross multiply
   51,787.25x = 79,970.50 × 79,970.50
4. Step 4: Simplify right side
   51,787.25x = 6,395,280,870.25
5. Step 5: Solve for x
   x = 6,395,280,870.25/51,787.25
6. Step 6: Final answer
   x = 123,491.42