Finding the Third Proportional to 86,261.55 and 188,515.48

Step by Step Solution

1. Step 1: Write the proportion equation
   86,261.55 : 188,515.48 = 188,515.48 : x
2. Step 2: Convert to fraction form
   86,261.55/188,515.48 = 188,515.48/x
3. Step 3: Cross multiply
   86,261.55x = 188,515.48 × 188,515.48
4. Step 4: Simplify right side
   86,261.55x = 35,538,084,903.59
5. Step 5: Solve for x
   x = 35,538,084,903.59/86,261.55
6. Step 6: Final answer
   x = 411,980.58