Finding the Third Proportional to 58,072.78 and 85,189.78

Step by Step Solution

1. Step 1: Write the proportion equation
   58,072.78 : 85,189.78 = 85,189.78 : x
2. Step 2: Convert to fraction form
   58,072.78/85,189.78 = 85,189.78/x
3. Step 3: Cross multiply
   58,072.78x = 85,189.78 × 85,189.78
4. Step 4: Simplify right side
   58,072.78x = 7,257,298,829.42
5. Step 5: Solve for x
   x = 7,257,298,829.42/58,072.78
6. Step 6: Final answer
   x = 124,969.02