Finding the Third Proportional to 81,240 and 188,056

Step by Step Solution

1. Step 1: Write the proportion equation
   81,240 : 188,056 = 188,056 : x
2. Step 2: Convert to fraction form
   81,240/188,056 = 188,056/x
3. Step 3: Cross multiply
   81,240x = 188,056 × 188,056
4. Step 4: Simplify right side
   81,240x = 35,365,059,136
5. Step 5: Solve for x
   x = 35,365,059,136/81,240
6. Step 6: Final answer
   x = 435,315.84