Finding the Fourth Proportional to 111,820.05, 154,311.75 and 64,101.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111,820.05 : 154,311.75 = 64,101.15 : x
2. Step 2: Convert to fraction form
   111,820.05/154,311.75 = 64,101.15/x
3. Step 3: Cross multiply
   111,820.05x = 154,311.75 × 64,101.15
4. Step 4: Simplify right side
   111,820.05x = 9,891,560,633.51
5. Step 5: Solve for x
   x = 9,891,560,633.51/111,820.05
6. Step 6: Final answer
   x = 88,459.63