Finding the Fourth Proportional to 85,525.60, 128,300.55 and 26,355.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,525.60 : 128,300.55 = 26,355.10 : x
2. Step 2: Convert to fraction form
   85,525.60/128,300.55 = 26,355.10/x
3. Step 3: Cross multiply
   85,525.60x = 128,300.55 × 26,355.10
4. Step 4: Simplify right side
   85,525.60x = 3,381,373,825.31
5. Step 5: Solve for x
   x = 3,381,373,825.31/85,525.60
6. Step 6: Final answer
   x = 39,536.39