Finding the Fourth Proportional to 12,782.72, 17,638.89 and 7,476.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782.72 : 17,638.89 = 7,476.50 : x
2. Step 2: Convert to fraction form
   12,782.72/17,638.89 = 7,476.50/x
3. Step 3: Cross multiply
   12,782.72x = 17,638.89 × 7,476.50
4. Step 4: Simplify right side
   12,782.72x = 131,877,161.09
5. Step 5: Solve for x
   x = 131,877,161.09/12,782.72
6. Step 6: Final answer
   x = 10,316.83