Finding the Third Proportional to 36,313.31 and 78,187.78

Step by Step Solution

1. Step 1: Write the proportion equation
   36,313.31 : 78,187.78 = 78,187.78 : x
2. Step 2: Convert to fraction form
   36,313.31/78,187.78 = 78,187.78/x
3. Step 3: Cross multiply
   36,313.31x = 78,187.78 × 78,187.78
4. Step 4: Simplify right side
   36,313.31x = 6,113,329,136.80
5. Step 5: Solve for x
   x = 6,113,329,136.80/36,313.31
6. Step 6: Final answer
   x = 168,349.53