Finding the Third Proportional to 78,139.13 and 116,693.25

Step by Step Solution

1. Step 1: Write the proportion equation
   78,139.13 : 116,693.25 = 116,693.25 : x
2. Step 2: Convert to fraction form
   78,139.13/116,693.25 = 116,693.25/x
3. Step 3: Cross multiply
   78,139.13x = 116,693.25 × 116,693.25
4. Step 4: Simplify right side
   78,139.13x = 13,617,314,595.56
5. Step 5: Solve for x
   x = 13,617,314,595.56/78,139.13
6. Step 6: Final answer
   x = 174,270.12