Finding the Fourth Proportional to 57,719.31, 86,606.38 and 39,977.27

Step by Step Solution

1. Step 1: Write the proportion equation
   57,719.31 : 86,606.38 = 39,977.27 : x
2. Step 2: Convert to fraction form
   57,719.31/86,606.38 = 39,977.27/x
3. Step 3: Cross multiply
   57,719.31x = 86,606.38 × 39,977.27
4. Step 4: Simplify right side
   57,719.31x = 3,462,286,636.98
5. Step 5: Solve for x
   x = 3,462,286,636.98/57,719.31
6. Step 6: Final answer
   x = 59,984.89