Finding the Fourth Proportional to 149,012.16, 205,632.72 and 81,944.16

Step by Step Solution

1. Step 1: Write the proportion equation
   149,012.16 : 205,632.72 = 81,944.16 : x
2. Step 2: Convert to fraction form
   149,012.16/205,632.72 = 81,944.16/x
3. Step 3: Cross multiply
   149,012.16x = 205,632.72 × 81,944.16
4. Step 4: Simplify right side
   149,012.16x = 16,850,400,508.92
5. Step 5: Solve for x
   x = 16,850,400,508.92/149,012.16
6. Step 6: Final answer
   x = 113,080.71