Finding the Fourth Proportional to 151,914.42, 209,554.29 and 91,443.06

Step by Step Solution

1. Step 1: Write the proportion equation
   151,914.42 : 209,554.29 = 91,443.06 : x
2. Step 2: Convert to fraction form
   151,914.42/209,554.29 = 91,443.06/x
3. Step 3: Cross multiply
   151,914.42x = 209,554.29 × 91,443.06
4. Step 4: Simplify right side
   151,914.42x = 19,162,285,513.73
5. Step 5: Solve for x
   x = 19,162,285,513.73/151,914.42
6. Step 6: Final answer
   x = 126,138.69