Finding the Fourth Proportional to 151,561.80, 209,156.31 and 83,581.20

Step by Step Solution

1. Step 1: Write the proportion equation
   151,561.80 : 209,156.31 = 83,581.20 : x
2. Step 2: Convert to fraction form
   151,561.80/209,156.31 = 83,581.20/x
3. Step 3: Cross multiply
   151,561.80x = 209,156.31 × 83,581.20
4. Step 4: Simplify right side
   151,561.80x = 17,481,535,377.37
5. Step 5: Solve for x
   x = 17,481,535,377.37/151,561.80
6. Step 6: Final answer
   x = 115,342.62