Finding the Fourth Proportional to 85,557.09, 128,228.72 and 41,171.93

Step by Step Solution

1. Step 1: Write the proportion equation
   85,557.09 : 128,228.72 = 41,171.93 : x
2. Step 2: Convert to fraction form
   85,557.09/128,228.72 = 41,171.93/x
3. Step 3: Cross multiply
   85,557.09x = 128,228.72 × 41,171.93
4. Step 4: Simplify right side
   85,557.09x = 5,279,423,036.83
5. Step 5: Solve for x
   x = 5,279,423,036.83/85,557.09
6. Step 6: Final answer
   x = 61,706.44