Finding the Fourth Proportional to 83,659.78, 115,450.60 and 45,419.37

Step by Step Solution

1. Step 1: Write the proportion equation
   83,659.78 : 115,450.60 = 45,419.37 : x
2. Step 2: Convert to fraction form
   83,659.78/115,450.60 = 45,419.37/x
3. Step 3: Cross multiply
   83,659.78x = 115,450.60 × 45,419.37
4. Step 4: Simplify right side
   83,659.78x = 5,243,692,940.87
5. Step 5: Solve for x
   x = 5,243,692,940.87/83,659.78
6. Step 6: Final answer
   x = 62,678.78