Finding the Fourth Proportional to 150,689, 207,960.56 and 83,621

Step by Step Solution

1. Step 1: Write the proportion equation
   150,689 : 207,960.56 = 83,621 : x
2. Step 2: Convert to fraction form
   150,689/207,960.56 = 83,621/x
3. Step 3: Cross multiply
   150,689x = 207,960.56 × 83,621
4. Step 4: Simplify right side
   150,689x = 17,389,869,987.76
5. Step 5: Solve for x
   x = 17,389,869,987.76/150,689
6. Step 6: Final answer
   x = 115,402.38