Finding the Fourth Proportional to 78,389.12, 117,601.32 and 25,796.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,389.12 : 117,601.32 = 25,796.72 : x
2. Step 2: Convert to fraction form
   78,389.12/117,601.32 = 25,796.72/x
3. Step 3: Cross multiply
   78,389.12x = 117,601.32 × 25,796.72
4. Step 4: Simplify right side
   78,389.12x = 3,033,728,323.67
5. Step 5: Solve for x
   x = 3,033,728,323.67/78,389.12
6. Step 6: Final answer
   x = 38,700.89