Finding the Fourth Proportional to 149,111.20, 205,754.74 and 100,818.19

Step by Step Solution

1. Step 1: Write the proportion equation
   149,111.20 : 205,754.74 = 100,818.19 : x
2. Step 2: Convert to fraction form
   149,111.20/205,754.74 = 100,818.19/x
3. Step 3: Cross multiply
   149,111.20x = 205,754.74 × 100,818.19
4. Step 4: Simplify right side
   149,111.20x = 20,743,820,470.72
5. Step 5: Solve for x
   x = 20,743,820,470.72/149,111.20
6. Step 6: Final answer
   x = 139,116.45