Finding the Fourth Proportional to 258,706.03, 388,059.15 and 116,385.07

Step by Step Solution

1. Step 1: Write the proportion equation
   258,706.03 : 388,059.15 = 116,385.07 : x
2. Step 2: Convert to fraction form
   258,706.03/388,059.15 = 116,385.07/x
3. Step 3: Cross multiply
   258,706.03x = 388,059.15 × 116,385.07
4. Step 4: Simplify right side
   258,706.03x = 45,164,291,336.89
5. Step 5: Solve for x
   x = 45,164,291,336.89/258,706.03
6. Step 6: Final answer
   x = 174,577.65