Finding the Fourth Proportional to 78,685.72, 118,045.37 and 25,380.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,685.72 : 118,045.37 = 25,380.70 : x
2. Step 2: Convert to fraction form
   78,685.72/118,045.37 = 25,380.70/x
3. Step 3: Cross multiply
   78,685.72x = 118,045.37 × 25,380.70
4. Step 4: Simplify right side
   78,685.72x = 2,996,073,995.46
5. Step 5: Solve for x
   x = 2,996,073,995.46/78,685.72
6. Step 6: Final answer
   x = 38,076.46