Finding the Fourth Proportional to 12,747.88, 19,123.89 and 3,980.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,747.88 : 19,123.89 = 3,980.98 : x
2. Step 2: Convert to fraction form
   12,747.88/19,123.89 = 3,980.98/x
3. Step 3: Cross multiply
   12,747.88x = 19,123.89 × 3,980.98
4. Step 4: Simplify right side
   12,747.88x = 76,131,823.61
5. Step 5: Solve for x
   x = 76,131,823.61/12,747.88
6. Step 6: Final answer
   x = 5,972.12