Finding the Fourth Proportional to 258,076.47, 387,048.96 and 80,601.42

Step by Step Solution

1. Step 1: Write the proportion equation
   258,076.47 : 387,048.96 = 80,601.42 : x
2. Step 2: Convert to fraction form
   258,076.47/387,048.96 = 80,601.42/x
3. Step 3: Cross multiply
   258,076.47x = 387,048.96 × 80,601.42
4. Step 4: Simplify right side
   258,076.47x = 31,196,695,785.52
5. Step 5: Solve for x
   x = 31,196,695,785.52/258,076.47
6. Step 6: Final answer
   x = 120,881.60