Finding the Fourth Proportional to 111,839.49, 154,342.76 and 64,102.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,839.49 : 154,342.76 = 64,102.05 : x
2. Step 2: Convert to fraction form
   111,839.49/154,342.76 = 64,102.05/x
3. Step 3: Cross multiply
   111,839.49x = 154,342.76 × 64,102.05
4. Step 4: Simplify right side
   111,839.49x = 9,893,686,998.15
5. Step 5: Solve for x
   x = 9,893,686,998.15/111,839.49
6. Step 6: Final answer
   x = 88,463.27