Finding the Fourth Proportional to 12,780.59, 17,634.51 and 7,474.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780.59 : 17,634.51 = 7,474.34 : x
2. Step 2: Convert to fraction form
   12,780.59/17,634.51 = 7,474.34/x
3. Step 3: Cross multiply
   12,780.59x = 17,634.51 × 7,474.34
4. Step 4: Simplify right side
   12,780.59x = 131,806,367.56
5. Step 5: Solve for x
   x = 131,806,367.56/12,780.59
6. Step 6: Final answer
   x = 10,313.02