Finding the Fourth Proportional to 120,431.98, 166,196.14 and 65,984.38

Step by Step Solution

1. Step 1: Write the proportion equation
   120,431.98 : 166,196.14 = 65,984.38 : x
2. Step 2: Convert to fraction form
   120,431.98/166,196.14 = 65,984.38/x
3. Step 3: Cross multiply
   120,431.98x = 166,196.14 × 65,984.38
4. Step 4: Simplify right side
   120,431.98x = 10,966,349,256.29
5. Step 5: Solve for x
   x = 10,966,349,256.29/120,431.98
6. Step 6: Final answer
   x = 91,058.45