Finding the Fourth Proportional to 78,282.90, 117,380.34 and 25,687.98

Step by Step Solution

1. Step 1: Write the proportion equation
   78,282.90 : 117,380.34 = 25,687.98 : x
2. Step 2: Convert to fraction form
   78,282.90/117,380.34 = 25,687.98/x
3. Step 3: Cross multiply
   78,282.90x = 117,380.34 × 25,687.98
4. Step 4: Simplify right side
   78,282.90x = 3,015,263,826.31
5. Step 5: Solve for x
   x = 3,015,263,826.31/78,282.90
6. Step 6: Final answer
   x = 38,517.53