Finding the Fourth Proportional to 200,969.22, 301,499.82 and 87,136.05

Step by Step Solution

1. Step 1: Write the proportion equation
   200,969.22 : 301,499.82 = 87,136.05 : x
2. Step 2: Convert to fraction form
   200,969.22/301,499.82 = 87,136.05/x
3. Step 3: Cross multiply
   200,969.22x = 301,499.82 × 87,136.05
4. Step 4: Simplify right side
   200,969.22x = 26,271,503,390.51
5. Step 5: Solve for x
   x = 26,271,503,390.51/200,969.22
6. Step 6: Final answer
   x = 130,724.02