Finding the Fourth Proportional to 28,379.75, 42,525.86 and 17,969.63

Step by Step Solution

1. Step 1: Write the proportion equation
   28,379.75 : 42,525.86 = 17,969.63 : x
2. Step 2: Convert to fraction form
   28,379.75/42,525.86 = 17,969.63/x
3. Step 3: Cross multiply
   28,379.75x = 42,525.86 × 17,969.63
4. Step 4: Simplify right side
   28,379.75x = 764,173,667.15
5. Step 5: Solve for x
   x = 764,173,667.15/28,379.75
6. Step 6: Final answer
   x = 26,926.73