Finding the Fourth Proportional to 259,300.27, 388,946.53 and 158,128.05

Step by Step Solution

1. Step 1: Write the proportion equation
   259,300.27 : 388,946.53 = 158,128.05 : x
2. Step 2: Convert to fraction form
   259,300.27/388,946.53 = 158,128.05/x
3. Step 3: Cross multiply
   259,300.27x = 388,946.53 × 158,128.05
4. Step 4: Simplify right side
   259,300.27x = 61,503,354,398.43
5. Step 5: Solve for x
   x = 61,503,354,398.43/259,300.27
6. Step 6: Final answer
   x = 237,189.71