Finding the Fourth Proportional to 166,536.81, 229,826.30 and 91,085.31

Step by Step Solution

1. Step 1: Write the proportion equation
   166,536.81 : 229,826.30 = 91,085.31 : x
2. Step 2: Convert to fraction form
   166,536.81/229,826.30 = 91,085.31/x
3. Step 3: Cross multiply
   166,536.81x = 229,826.30 × 91,085.31
4. Step 4: Simplify right side
   166,536.81x = 20,933,799,326.23
5. Step 5: Solve for x
   x = 20,933,799,326.23/166,536.81
6. Step 6: Final answer
   x = 125,700.73