Finding the Third Proportional to 58,081.50 and 85,421

Step by Step Solution

1. Step 1: Write the proportion equation
   58,081.50 : 85,421 = 85,421 : x
2. Step 2: Convert to fraction form
   58,081.50/85,421 = 85,421/x
3. Step 3: Cross multiply
   58,081.50x = 85,421 × 85,421
4. Step 4: Simplify right side
   58,081.50x = 7,296,747,241
5. Step 5: Solve for x
   x = 7,296,747,241/58,081.50
6. Step 6: Final answer
   x = 125,629.46