Finding the Fourth Proportional to 342,109, 472,095.57 and 187,057.45

Step by Step Solution

1. Step 1: Write the proportion equation
   342,109 : 472,095.57 = 187,057.45 : x
2. Step 2: Convert to fraction form
   342,109/472,095.57 = 187,057.45/x
3. Step 3: Cross multiply
   342,109x = 472,095.57 × 187,057.45
4. Step 4: Simplify right side
   342,109x = 88,308,993,480.50
5. Step 5: Solve for x
   x = 88,308,993,480.50/342,109
6. Step 6: Final answer
   x = 258,131.16