Finding the Third Proportional to 78,658.59 and 117,986.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,658.59 : 117,986.63 = 117,986.63 : x
2. Step 2: Convert to fraction form
   78,658.59/117,986.63 = 117,986.63/x
3. Step 3: Cross multiply
   78,658.59x = 117,986.63 × 117,986.63
4. Step 4: Simplify right side
   78,658.59x = 13,920,843,678.89
5. Step 5: Solve for x
   x = 13,920,843,678.89/78,658.59
6. Step 6: Final answer
   x = 176,978.04