Finding the Fourth Proportional to 28,499.34, 42,744.99 and 9,779.07

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.34 : 42,744.99 = 9,779.07 : x
2. Step 2: Convert to fraction form
   28,499.34/42,744.99 = 9,779.07/x
3. Step 3: Cross multiply
   28,499.34x = 42,744.99 × 9,779.07
4. Step 4: Simplify right side
   28,499.34x = 418,006,249.36
5. Step 5: Solve for x
   x = 418,006,249.36/28,499.34
6. Step 6: Final answer
   x = 14,667.23