Finding the Fourth Proportional to 145,809, 201,216.42 and 78,741

Step by Step Solution

1. Step 1: Write the proportion equation
   145,809 : 201,216.42 = 78,741 : x
2. Step 2: Convert to fraction form
   145,809/201,216.42 = 78,741/x
3. Step 3: Cross multiply
   145,809x = 201,216.42 × 78,741
4. Step 4: Simplify right side
   145,809x = 15,843,982,127.22
5. Step 5: Solve for x
   x = 15,843,982,127.22/145,809
6. Step 6: Final answer
   x = 108,662.58