Finding the Fourth Proportional to 123,854.24, 170,922.24 and 72,870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,854.24 : 170,922.24 = 72,870.56 : x
2. Step 2: Convert to fraction form
   123,854.24/170,922.24 = 72,870.56/x
3. Step 3: Cross multiply
   123,854.24x = 170,922.24 × 72,870.56
4. Step 4: Simplify right side
   123,854.24x = 12,455,199,345.25
5. Step 5: Solve for x
   x = 12,455,199,345.25/123,854.24
6. Step 6: Final answer
   x = 100,563.37