Finding the Fourth Proportional to 78,494.82, 117,698.49 and 25,890.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,494.82 : 117,698.49 = 25,890.18 : x
2. Step 2: Convert to fraction form
   78,494.82/117,698.49 = 25,890.18/x
3. Step 3: Cross multiply
   78,494.82x = 117,698.49 × 25,890.18
4. Step 4: Simplify right side
   78,494.82x = 3,047,235,091.83
5. Step 5: Solve for x
   x = 3,047,235,091.83/78,494.82
6. Step 6: Final answer
   x = 38,820.84