Finding the Fourth Proportional to 153,353.21, 229,843.31 and 82,100.75

Step by Step Solution

1. Step 1: Write the proportion equation
   153,353.21 : 229,843.31 = 82,100.75 : x
2. Step 2: Convert to fraction form
   153,353.21/229,843.31 = 82,100.75/x
3. Step 3: Cross multiply
   153,353.21x = 229,843.31 × 82,100.75
4. Step 4: Simplify right side
   153,353.21x = 18,870,308,738.83
5. Step 5: Solve for x
   x = 18,870,308,738.83/153,353.21
6. Step 6: Final answer
   x = 123,051.28