Finding the Third Proportional to 81,620 and 115,595.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,620 : 115,595.50 = 115,595.50 : x
2. Step 2: Convert to fraction form
   81,620/115,595.50 = 115,595.50/x
3. Step 3: Cross multiply
   81,620x = 115,595.50 × 115,595.50
4. Step 4: Simplify right side
   81,620x = 13,362,319,620.25
5. Step 5: Solve for x
   x = 13,362,319,620.25/81,620
6. Step 6: Final answer
   x = 163,713.79