Finding the Fourth Proportional to 113,019.84, 155,951.46 and 67,687.20

Step by Step Solution

1. Step 1: Write the proportion equation
   113,019.84 : 155,951.46 = 67,687.20 : x
2. Step 2: Convert to fraction form
   113,019.84/155,951.46 = 67,687.20/x
3. Step 3: Cross multiply
   113,019.84x = 155,951.46 × 67,687.20
4. Step 4: Simplify right side
   113,019.84x = 10,555,917,663.31
5. Step 5: Solve for x
   x = 10,555,917,663.31/113,019.84
6. Step 6: Final answer
   x = 93,398.80