Finding the Fourth Proportional to 154,940.80, 213,822.56 and 86,962

Step by Step Solution

1. Step 1: Write the proportion equation
   154,940.80 : 213,822.56 = 86,962 : x
2. Step 2: Convert to fraction form
   154,940.80/213,822.56 = 86,962/x
3. Step 3: Cross multiply
   154,940.80x = 213,822.56 × 86,962
4. Step 4: Simplify right side
   154,940.80x = 18,594,437,462.72
5. Step 5: Solve for x
   x = 18,594,437,462.72/154,940.80
6. Step 6: Final answer
   x = 120,009.95