Finding the Fourth Proportional to 151,680.72, 209,320.08 and 83,698.56

Step by Step Solution

1. Step 1: Write the proportion equation
   151,680.72 : 209,320.08 = 83,698.56 : x
2. Step 2: Convert to fraction form
   151,680.72/209,320.08 = 83,698.56/x
3. Step 3: Cross multiply
   151,680.72x = 209,320.08 × 83,698.56
4. Step 4: Simplify right side
   151,680.72x = 17,519,789,275.08
5. Step 5: Solve for x
   x = 17,519,789,275.08/151,680.72
6. Step 6: Final answer
   x = 115,504.39