Finding the Fourth Proportional to 171,886.89, 257,566.61 and 71,992.42

Step by Step Solution

1. Step 1: Write the proportion equation
   171,886.89 : 257,566.61 = 71,992.42 : x
2. Step 2: Convert to fraction form
   171,886.89/257,566.61 = 71,992.42/x
3. Step 3: Cross multiply
   171,886.89x = 257,566.61 × 71,992.42
4. Step 4: Simplify right side
   171,886.89x = 18,542,843,205.13
5. Step 5: Solve for x
   x = 18,542,843,205.13/171,886.89
6. Step 6: Final answer
   x = 107,878.17