Finding the Fourth Proportional to 85,597.45, 128,410.76 and 25,629.91

Step by Step Solution

1. Step 1: Write the proportion equation
   85,597.45 : 128,410.76 = 25,629.91 : x
2. Step 2: Convert to fraction form
   85,597.45/128,410.76 = 25,629.91/x
3. Step 3: Cross multiply
   85,597.45x = 128,410.76 × 25,629.91
4. Step 4: Simplify right side
   85,597.45x = 3,291,156,221.83
5. Step 5: Solve for x
   x = 3,291,156,221.83/85,597.45
6. Step 6: Final answer
   x = 38,449.23