Finding the Fourth Proportional to 151,900.45, 209,621.61 and 83,921.81

Step by Step Solution

1. Step 1: Write the proportion equation
   151,900.45 : 209,621.61 = 83,921.81 : x
2. Step 2: Convert to fraction form
   151,900.45/209,621.61 = 83,921.81/x
3. Step 3: Cross multiply
   151,900.45x = 209,621.61 × 83,921.81
4. Step 4: Simplify right side
   151,900.45x = 17,591,823,878.21
5. Step 5: Solve for x
   x = 17,591,823,878.21/151,900.45
6. Step 6: Final answer
   x = 115,811.53