Finding the Fourth Proportional to 78,039.60, 117,047.52 and 25,449

Step by Step Solution

1. Step 1: Write the proportion equation
   78,039.60 : 117,047.52 = 25,449 : x
2. Step 2: Convert to fraction form
   78,039.60/117,047.52 = 25,449/x
3. Step 3: Cross multiply
   78,039.60x = 117,047.52 × 25,449
4. Step 4: Simplify right side
   78,039.60x = 2,978,742,336.48
5. Step 5: Solve for x
   x = 2,978,742,336.48/78,039.60
6. Step 6: Final answer
   x = 38,169.63