Finding the Fourth Proportional to 28,496.56, 42,748.88 and 8,776.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,496.56 : 42,748.88 = 8,776.72 : x
2. Step 2: Convert to fraction form
   28,496.56/42,748.88 = 8,776.72/x
3. Step 3: Cross multiply
   28,496.56x = 42,748.88 × 8,776.72
4. Step 4: Simplify right side
   28,496.56x = 375,194,950.07
5. Step 5: Solve for x
   x = 375,194,950.07/28,496.56
6. Step 6: Final answer
   x = 13,166.32