Finding the Fourth Proportional to 188,786, 260,466 and 107,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   188,786 : 260,466 = 107,100.78 : x
2. Step 2: Convert to fraction form
   188,786/260,466 = 107,100.78/x
3. Step 3: Cross multiply
   188,786x = 260,466 × 107,100.78
4. Step 4: Simplify right side
   188,786x = 27,896,111,763.48
5. Step 5: Solve for x
   x = 27,896,111,763.48/188,786
6. Step 6: Final answer
   x = 147,765.79