Finding the Fourth Proportional to 85,105.80, 127,665 and 28,923.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,105.80 : 127,665 = 28,923.12 : x
2. Step 2: Convert to fraction form
   85,105.80/127,665 = 28,923.12/x
3. Step 3: Cross multiply
   85,105.80x = 127,665 × 28,923.12
4. Step 4: Simplify right side
   85,105.80x = 3,692,470,114.80
5. Step 5: Solve for x
   x = 3,692,470,114.80/85,105.80
6. Step 6: Final answer
   x = 43,386.82