Finding the Third Proportional to 58,778.50 and 85,706

Step by Step Solution

1. Step 1: Write the proportion equation
   58,778.50 : 85,706 = 85,706 : x
2. Step 2: Convert to fraction form
   58,778.50/85,706 = 85,706/x
3. Step 3: Cross multiply
   58,778.50x = 85,706 × 85,706
4. Step 4: Simplify right side
   58,778.50x = 7,345,518,436
5. Step 5: Solve for x
   x = 7,345,518,436/58,778.50
6. Step 6: Final answer
   x = 124,969.48