Finding the Fourth Proportional to 85,585.59, 128,271.45 and 41,200.47

Step by Step Solution

1. Step 1: Write the proportion equation
   85,585.59 : 128,271.45 = 41,200.47 : x
2. Step 2: Convert to fraction form
   85,585.59/128,271.45 = 41,200.47/x
3. Step 3: Cross multiply
   85,585.59x = 128,271.45 × 41,200.47
4. Step 4: Simplify right side
   85,585.59x = 5,284,844,027.58
5. Step 5: Solve for x
   x = 5,284,844,027.58/85,585.59
6. Step 6: Final answer
   x = 61,749.23