Finding the Fourth Proportional to 85,353.38, 128,055.69 and 40,409.00

Step by Step Solution

1. Step 1: Write the proportion equation
   85,353.38 : 128,055.69 = 40,409.00 : x
2. Step 2: Convert to fraction form
   85,353.38/128,055.69 = 40,409.00/x
3. Step 3: Cross multiply
   85,353.38x = 128,055.69 × 40,409.00
4. Step 4: Simplify right side
   85,353.38x = 5,174,601,736.93
5. Step 5: Solve for x
   x = 5,174,601,736.93/85,353.38
6. Step 6: Final answer
   x = 60,625.63