Finding the Fourth Proportional to 308,300.25, 425,336.22 and 187,397.43

Step by Step Solution

1. Step 1: Write the proportion equation
   308,300.25 : 425,336.22 = 187,397.43 : x
2. Step 2: Convert to fraction form
   308,300.25/425,336.22 = 187,397.43/x
3. Step 3: Cross multiply
   308,300.25x = 425,336.22 × 187,397.43
4. Step 4: Simplify right side
   308,300.25x = 79,706,914,513.91
5. Step 5: Solve for x
   x = 79,706,914,513.91/308,300.25
6. Step 6: Final answer
   x = 258,536.65