Finding the Third Proportional to 56,588 and 86,690

Step by Step Solution

1. Step 1: Write the proportion equation
   56,588 : 86,690 = 86,690 : x
2. Step 2: Convert to fraction form
   56,588/86,690 = 86,690/x
3. Step 3: Cross multiply
   56,588x = 86,690 × 86,690
4. Step 4: Simplify right side
   56,588x = 7,515,156,100
5. Step 5: Solve for x
   x = 7,515,156,100/56,588
6. Step 6: Final answer
   x = 132,804.77