Finding the Third Proportional to 78,230.81 and 117,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,230.81 : 117,710.72 = 117,710.72 : x
2. Step 2: Convert to fraction form
   78,230.81/117,710.72 = 117,710.72/x
3. Step 3: Cross multiply
   78,230.81x = 117,710.72 × 117,710.72
4. Step 4: Simplify right side
   78,230.81x = 13,855,813,308.64
5. Step 5: Solve for x
   x = 13,855,813,308.64/78,230.81
6. Step 6: Final answer
   x = 177,114.53