Finding the Fourth Proportional to 210,842.37, 290,969.37 and 120,196.71

Step by Step Solution

1. Step 1: Write the proportion equation
   210,842.37 : 290,969.37 = 120,196.71 : x
2. Step 2: Convert to fraction form
   210,842.37/290,969.37 = 120,196.71/x
3. Step 3: Cross multiply
   210,842.37x = 290,969.37 × 120,196.71
4. Step 4: Simplify right side
   210,842.37x = 34,973,560,984.77
5. Step 5: Solve for x
   x = 34,973,560,984.77/210,842.37
6. Step 6: Final answer
   x = 165,875.39