Finding the Fourth Proportional to 123,078.80, 184,564.20 and 56,496.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,078.80 : 184,564.20 = 56,496.80 : x
2. Step 2: Convert to fraction form
   123,078.80/184,564.20 = 56,496.80/x
3. Step 3: Cross multiply
   123,078.80x = 184,564.20 × 56,496.80
4. Step 4: Simplify right side
   123,078.80x = 10,427,286,694.56
5. Step 5: Solve for x
   x = 10,427,286,694.56/123,078.80
6. Step 6: Final answer
   x = 84,720.41