Finding the Fourth Proportional to 258,047.82, 387,056.34 and 80,529.84

Step by Step Solution

1. Step 1: Write the proportion equation
   258,047.82 : 387,056.34 = 80,529.84 : x
2. Step 2: Convert to fraction form
   258,047.82/387,056.34 = 80,529.84/x
3. Step 3: Cross multiply
   258,047.82x = 387,056.34 × 80,529.84
4. Step 4: Simplify right side
   258,047.82x = 31,169,585,131.19
5. Step 5: Solve for x
   x = 31,169,585,131.19/258,047.82
6. Step 6: Final answer
   x = 120,789.96