Finding the Fourth Proportional to 151,642.72, 209,267.65 and 83,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,642.72 : 209,267.65 = 83,660.50 : x
2. Step 2: Convert to fraction form
   151,642.72/209,267.65 = 83,660.50/x
3. Step 3: Cross multiply
   151,642.72x = 209,267.65 × 83,660.50
4. Step 4: Simplify right side
   151,642.72x = 17,507,436,232.83
5. Step 5: Solve for x
   x = 17,507,436,232.83/151,642.72
6. Step 6: Final answer
   x = 115,451.87