Finding the Third Proportional to 55,479 and 85,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,479 : 85,072.50 = 85,072.50 : x
2. Step 2: Convert to fraction form
   55,479/85,072.50 = 85,072.50/x
3. Step 3: Cross multiply
   55,479x = 85,072.50 × 85,072.50
4. Step 4: Simplify right side
   55,479x = 7,237,330,256.25
5. Step 5: Solve for x
   x = 7,237,330,256.25/55,479
6. Step 6: Final answer
   x = 130,451.71