Finding the Fourth Proportional to 28,499.14, 42,749.31 and 9,779.08

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.14 : 42,749.31 = 9,779.08 : x
2. Step 2: Convert to fraction form
   28,499.14/42,749.31 = 9,779.08/x
3. Step 3: Cross multiply
   28,499.14x = 42,749.31 × 9,779.08
4. Step 4: Simplify right side
   28,499.14x = 418,048,922.43
5. Step 5: Solve for x
   x = 418,048,922.43/28,499.14
6. Step 6: Final answer
   x = 14,668.83