Finding the Fourth Proportional to 111,839.64, 154,338.12 and 64,091.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111,839.64 : 154,338.12 = 64,091.76 : x
2. Step 2: Convert to fraction form
   111,839.64/154,338.12 = 64,091.76/x
3. Step 3: Cross multiply
   111,839.64x = 154,338.12 × 64,091.76
4. Step 4: Simplify right side
   111,839.64x = 9,891,801,745.89
5. Step 5: Solve for x
   x = 9,891,801,745.89/111,839.64
6. Step 6: Final answer
   x = 88,446.29