Finding the Third Proportional to 78,309.50 and 118,557.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309.50 : 118,557.50 = 118,557.50 : x
2. Step 2: Convert to fraction form
   78,309.50/118,557.50 = 118,557.50/x
3. Step 3: Cross multiply
   78,309.50x = 118,557.50 × 118,557.50
4. Step 4: Simplify right side
   78,309.50x = 14,055,880,806.25
5. Step 5: Solve for x
   x = 14,055,880,806.25/78,309.50
6. Step 6: Final answer
   x = 179,491.39