Finding the Fourth Proportional to 151,657.83, 209,299.55 and 83,688.30

Step by Step Solution

1. Step 1: Write the proportion equation
   151,657.83 : 209,299.55 = 83,688.30 : x
2. Step 2: Convert to fraction form
   151,657.83/209,299.55 = 83,688.30/x
3. Step 3: Cross multiply
   151,657.83x = 209,299.55 × 83,688.30
4. Step 4: Simplify right side
   151,657.83x = 17,515,923,111.82
5. Step 5: Solve for x
   x = 17,515,923,111.82/151,657.83
6. Step 6: Final answer
   x = 115,496.33