Finding the Fourth Proportional to 123,563.37, 170,535.67 and 78,245.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,563.37 : 170,535.67 = 78,245.49 : x
2. Step 2: Convert to fraction form
   123,563.37/170,535.67 = 78,245.49/x
3. Step 3: Cross multiply
   123,563.37x = 170,535.67 × 78,245.49
4. Step 4: Simplify right side
   123,563.37x = 13,343,646,866.01
5. Step 5: Solve for x
   x = 13,343,646,866.01/123,563.37
6. Step 6: Final answer
   x = 107,990.31