Finding the Fourth Proportional to 28,501.88, 42,758.48 and 8,779.59

Step by Step Solution

1. Step 1: Write the proportion equation
   28,501.88 : 42,758.48 = 8,779.59 : x
2. Step 2: Convert to fraction form
   28,501.88/42,758.48 = 8,779.59/x
3. Step 3: Cross multiply
   28,501.88x = 42,758.48 × 8,779.59
4. Step 4: Simplify right side
   28,501.88x = 375,401,945.37
5. Step 5: Solve for x
   x = 375,401,945.37/28,501.88
6. Step 6: Final answer
   x = 13,171.13