Finding the Third Proportional to 78,109.31 and 118,258.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109.31 : 118,258.31 = 118,258.31 : x
2. Step 2: Convert to fraction form
   78,109.31/118,258.31 = 118,258.31/x
3. Step 3: Cross multiply
   78,109.31x = 118,258.31 × 118,258.31
4. Step 4: Simplify right side
   78,109.31x = 13,985,028,475.35
5. Step 5: Solve for x
   x = 13,985,028,475.35/78,109.31
6. Step 6: Final answer
   x = 179,044.32