Finding the Fourth Proportional to 111,900.36, 154,373.94 and 64,142.76

Step by Step Solution

1. Step 1: Write the proportion equation
   111,900.36 : 154,373.94 = 64,142.76 : x
2. Step 2: Convert to fraction form
   111,900.36/154,373.94 = 64,142.76/x
3. Step 3: Cross multiply
   111,900.36x = 154,373.94 × 64,142.76
4. Step 4: Simplify right side
   111,900.36x = 9,901,970,583.67
5. Step 5: Solve for x
   x = 9,901,970,583.67/111,900.36
6. Step 6: Final answer
   x = 88,489.18