Finding the Fourth Proportional to 190,641.78, 263,116.98 and 105,786.18

Step by Step Solution

1. Step 1: Write the proportion equation
   190,641.78 : 263,116.98 = 105,786.18 : x
2. Step 2: Convert to fraction form
   190,641.78/263,116.98 = 105,786.18/x
3. Step 3: Cross multiply
   190,641.78x = 263,116.98 × 105,786.18
4. Step 4: Simplify right side
   190,641.78x = 27,834,140,207.34
5. Step 5: Solve for x
   x = 27,834,140,207.34/190,641.78
6. Step 6: Final answer
   x = 146,002.31