Finding the Third Proportional to 72,027.56 and 78,486.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,027.56 : 78,486.05 = 78,486.05 : x
2. Step 2: Convert to fraction form
   72,027.56/78,486.05 = 78,486.05/x
3. Step 3: Cross multiply
   72,027.56x = 78,486.05 × 78,486.05
4. Step 4: Simplify right side
   72,027.56x = 6,160,059,554.06
5. Step 5: Solve for x
   x = 6,160,059,554.06/72,027.56
6. Step 6: Final answer
   x = 85,523.64