Finding the Fourth Proportional to 113,557.01, 170,141.78 and 80,212.88

Step by Step Solution

1. Step 1: Write the proportion equation
   113,557.01 : 170,141.78 = 80,212.88 : x
2. Step 2: Convert to fraction form
   113,557.01/170,141.78 = 80,212.88/x
3. Step 3: Cross multiply
   113,557.01x = 170,141.78 × 80,212.88
4. Step 4: Simplify right side
   113,557.01x = 13,647,562,808.01
5. Step 5: Solve for x
   x = 13,647,562,808.01/113,557.01
6. Step 6: Final answer
   x = 120,182.48