Finding the Fourth Proportional to 85,925.20, 128,778.45 and 41,456.20

Step by Step Solution

1. Step 1: Write the proportion equation
   85,925.20 : 128,778.45 = 41,456.20 : x
2. Step 2: Convert to fraction form
   85,925.20/128,778.45 = 41,456.20/x
3. Step 3: Cross multiply
   85,925.20x = 128,778.45 × 41,456.20
4. Step 4: Simplify right side
   85,925.20x = 5,338,665,178.89
5. Step 5: Solve for x
   x = 5,338,665,178.89/85,925.20
6. Step 6: Final answer
   x = 62,131.54