Finding the Fourth Proportional to 78,490.98, 117,786.42 and 28,566.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,490.98 : 117,786.42 = 28,566.27 : x
2. Step 2: Convert to fraction form
   78,490.98/117,786.42 = 28,566.27/x
3. Step 3: Cross multiply
   78,490.98x = 117,786.42 × 28,566.27
4. Step 4: Simplify right side
   78,490.98x = 3,364,718,676.05
5. Step 5: Solve for x
   x = 3,364,718,676.05/78,490.98
6. Step 6: Final answer
   x = 42,867.58