Finding the Fourth Proportional to 111,771.98, 154,218.33 and 70,921.21

Step by Step Solution

1. Step 1: Write the proportion equation
   111,771.98 : 154,218.33 = 70,921.21 : x
2. Step 2: Convert to fraction form
   111,771.98/154,218.33 = 70,921.21/x
3. Step 3: Cross multiply
   111,771.98x = 154,218.33 × 70,921.21
4. Step 4: Simplify right side
   111,771.98x = 10,937,350,567.78
5. Step 5: Solve for x
   x = 10,937,350,567.78/111,771.98
6. Step 6: Final answer
   x = 97,854.14