Finding the Fourth Proportional to 265,845.96, 398,608.28 and 105,946.50

Step by Step Solution

1. Step 1: Write the proportion equation
   265,845.96 : 398,608.28 = 105,946.50 : x
2. Step 2: Convert to fraction form
   265,845.96/398,608.28 = 105,946.50/x
3. Step 3: Cross multiply
   265,845.96x = 398,608.28 × 105,946.50
4. Step 4: Simplify right side
   265,845.96x = 42,231,152,137.02
5. Step 5: Solve for x
   x = 42,231,152,137.02/265,845.96
6. Step 6: Final answer
   x = 158,855.72