Finding the Fourth Proportional to 315,721.89, 435,704.76 and 188,471.34

Step by Step Solution

1. Step 1: Write the proportion equation
   315,721.89 : 435,704.76 = 188,471.34 : x
2. Step 2: Convert to fraction form
   315,721.89/435,704.76 = 188,471.34/x
3. Step 3: Cross multiply
   315,721.89x = 435,704.76 × 188,471.34
4. Step 4: Simplify right side
   315,721.89x = 82,117,859,961.58
5. Step 5: Solve for x
   x = 82,117,859,961.58/315,721.89
6. Step 6: Final answer
   x = 260,095.55