Finding the Fourth Proportional to 151,643.72, 209,269.03 and 83,661.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,643.72 : 209,269.03 = 83,661.50 : x
2. Step 2: Convert to fraction form
   151,643.72/209,269.03 = 83,661.50/x
3. Step 3: Cross multiply
   151,643.72x = 209,269.03 × 83,661.50
4. Step 4: Simplify right side
   151,643.72x = 17,507,760,953.35
5. Step 5: Solve for x
   x = 17,507,760,953.35/151,643.72
6. Step 6: Final answer
   x = 115,453.25