Finding the Fourth Proportional to 52,315.34, 78,472.33 and 12,872.79

Step by Step Solution

1. Step 1: Write the proportion equation
   52,315.34 : 78,472.33 = 12,872.79 : x
2. Step 2: Convert to fraction form
   52,315.34/78,472.33 = 12,872.79/x
3. Step 3: Cross multiply
   52,315.34x = 78,472.33 × 12,872.79
4. Step 4: Simplify right side
   52,315.34x = 1,010,157,792.72
5. Step 5: Solve for x
   x = 1,010,157,792.72/52,315.34
6. Step 6: Final answer
   x = 19,309.02