Finding the Fourth Proportional to 71,422.83, 107,147.79 and 28,731.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,422.83 : 107,147.79 = 28,731.54 : x
2. Step 2: Convert to fraction form
   71,422.83/107,147.79 = 28,731.54/x
3. Step 3: Cross multiply
   71,422.83x = 107,147.79 × 28,731.54
4. Step 4: Simplify right side
   71,422.83x = 3,078,521,014.30
5. Step 5: Solve for x
   x = 3,078,521,014.30/71,422.83
6. Step 6: Final answer
   x = 43,102.76