Finding the Fourth Proportional to 137,200.14, 204,968.84 and 86,877.27

Step by Step Solution

1. Step 1: Write the proportion equation
   137,200.14 : 204,968.84 = 86,877.27 : x
2. Step 2: Convert to fraction form
   137,200.14/204,968.84 = 86,877.27/x
3. Step 3: Cross multiply
   137,200.14x = 204,968.84 × 86,877.27
4. Step 4: Simplify right side
   137,200.14x = 17,807,132,819.88
5. Step 5: Solve for x
   x = 17,807,132,819.88/137,200.14
6. Step 6: Final answer
   x = 129,789.47