Finding the Fourth Proportional to 85,858.80, 128,786.17 and 23,529.30

Step by Step Solution

1. Step 1: Write the proportion equation
   85,858.80 : 128,786.17 = 23,529.30 : x
2. Step 2: Convert to fraction form
   85,858.80/128,786.17 = 23,529.30/x
3. Step 3: Cross multiply
   85,858.80x = 128,786.17 × 23,529.30
4. Step 4: Simplify right side
   85,858.80x = 3,030,248,429.78
5. Step 5: Solve for x
   x = 3,030,248,429.78/85,858.80
6. Step 6: Final answer
   x = 35,293.39