Finding the Fourth Proportional to 113,009.61, 155,942.58 and 67,686.81

Step by Step Solution

1. Step 1: Write the proportion equation
   113,009.61 : 155,942.58 = 67,686.81 : x
2. Step 2: Convert to fraction form
   113,009.61/155,942.58 = 67,686.81/x
3. Step 3: Cross multiply
   113,009.61x = 155,942.58 × 67,686.81
4. Step 4: Simplify right side
   113,009.61x = 10,555,255,783.37
5. Step 5: Solve for x
   x = 10,555,255,783.37/113,009.61
6. Step 6: Final answer
   x = 93,401.40