Finding the Fourth Proportional to 28,319.69, 42,476.78 and 8,598.42

Step by Step Solution

1. Step 1: Write the proportion equation
   28,319.69 : 42,476.78 = 8,598.42 : x
2. Step 2: Convert to fraction form
   28,319.69/42,476.78 = 8,598.42/x
3. Step 3: Cross multiply
   28,319.69x = 42,476.78 × 8,598.42
4. Step 4: Simplify right side
   28,319.69x = 365,233,216.18
5. Step 5: Solve for x
   x = 365,233,216.18/28,319.69
6. Step 6: Final answer
   x = 12,896.79