Finding the Fourth Proportional to 78,493.31, 117,744.04 and 25,906.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,493.31 : 117,744.04 = 25,906.90 : x
2. Step 2: Convert to fraction form
   78,493.31/117,744.04 = 25,906.90/x
3. Step 3: Cross multiply
   78,493.31x = 117,744.04 × 25,906.90
4. Step 4: Simplify right side
   78,493.31x = 3,050,383,069.88
5. Step 5: Solve for x
   x = 3,050,383,069.88/78,493.31
6. Step 6: Final answer
   x = 38,861.69