Finding the Fourth Proportional to 191,112.32, 263,735.17 and 105,072.77

Step by Step Solution

1. Step 1: Write the proportion equation
   191,112.32 : 263,735.17 = 105,072.77 : x
2. Step 2: Convert to fraction form
   191,112.32/263,735.17 = 105,072.77/x
3. Step 3: Cross multiply
   191,112.32x = 263,735.17 × 105,072.77
4. Step 4: Simplify right side
   191,112.32x = 27,711,384,858.32
5. Step 5: Solve for x
   x = 27,711,384,858.32/191,112.32
6. Step 6: Final answer
   x = 145,000.52