Finding the Fourth Proportional to 78,469.60, 117,667.30 and 28,514.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,469.60 : 117,667.30 = 28,514.88 : x
2. Step 2: Convert to fraction form
   78,469.60/117,667.30 = 28,514.88/x
3. Step 3: Cross multiply
   78,469.60x = 117,667.30 × 28,514.88
4. Step 4: Simplify right side
   78,469.60x = 3,355,268,939.42
5. Step 5: Solve for x
   x = 3,355,268,939.42/78,469.60
6. Step 6: Final answer
   x = 42,758.84