Finding the Fourth Proportional to 210,504.21, 290,499.98 and 115,016.82

Step by Step Solution

1. Step 1: Write the proportion equation
   210,504.21 : 290,499.98 = 115,016.82 : x
2. Step 2: Convert to fraction form
   210,504.21/290,499.98 = 115,016.82/x
3. Step 3: Cross multiply
   210,504.21x = 290,499.98 × 115,016.82
4. Step 4: Simplify right side
   210,504.21x = 33,412,383,909.66
5. Step 5: Solve for x
   x = 33,412,383,909.66/210,504.21
6. Step 6: Final answer
   x = 158,725.49