Finding the Fourth Proportional to 111,849.45, 154,347.69 and 64,069.57

Step by Step Solution

1. Step 1: Write the proportion equation
   111,849.45 : 154,347.69 = 64,069.57 : x
2. Step 2: Convert to fraction form
   111,849.45/154,347.69 = 64,069.57/x
3. Step 3: Cross multiply
   111,849.45x = 154,347.69 × 64,069.57
4. Step 4: Simplify right side
   111,849.45x = 9,888,990,128.79
5. Step 5: Solve for x
   x = 9,888,990,128.79/111,849.45
6. Step 6: Final answer
   x = 88,413.40