Finding the Fourth Proportional to 258,641.31, 388,005.71 and 118,410.87

Step by Step Solution

1. Step 1: Write the proportion equation
   258,641.31 : 388,005.71 = 118,410.87 : x
2. Step 2: Convert to fraction form
   258,641.31/388,005.71 = 118,410.87/x
3. Step 3: Cross multiply
   258,641.31x = 388,005.71 × 118,410.87
4. Step 4: Simplify right side
   258,641.31x = 45,944,093,094.01
5. Step 5: Solve for x
   x = 45,944,093,094.01/258,641.31
6. Step 6: Final answer
   x = 177,636.33