Finding the Fourth Proportional to 72,120.42, 99,519.47 and 41,905.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,120.42 : 99,519.47 = 41,905.42 : x
2. Step 2: Convert to fraction form
   72,120.42/99,519.47 = 41,905.42/x
3. Step 3: Cross multiply
   72,120.42x = 99,519.47 × 41,905.42
4. Step 4: Simplify right side
   72,120.42x = 4,170,404,979.00
5. Step 5: Solve for x
   x = 4,170,404,979.00/72,120.42
6. Step 6: Final answer
   x = 57,825.58