Finding the Fourth Proportional to 106,574.94, 159,709.86 and 78,273

Step by Step Solution

1. Step 1: Write the proportion equation
   106,574.94 : 159,709.86 = 78,273 : x
2. Step 2: Convert to fraction form
   106,574.94/159,709.86 = 78,273/x
3. Step 3: Cross multiply
   106,574.94x = 159,709.86 × 78,273
4. Step 4: Simplify right side
   106,574.94x = 12,500,969,871.78
5. Step 5: Solve for x
   x = 12,500,969,871.78/106,574.94
6. Step 6: Final answer
   x = 117,297.46