Finding the Fourth Proportional to 123,563.50, 170,535.84 and 78,245.62

Step by Step Solution

1. Step 1: Write the proportion equation
   123,563.50 : 170,535.84 = 78,245.62 : x
2. Step 2: Convert to fraction form
   123,563.50/170,535.84 = 78,245.62/x
3. Step 3: Cross multiply
   123,563.50x = 170,535.84 × 78,245.62
4. Step 4: Simplify right side
   123,563.50x = 13,343,682,533.02
5. Step 5: Solve for x
   x = 13,343,682,533.02/123,563.50
6. Step 6: Final answer
   x = 107,990.49