Finding the Fourth Proportional to 85,674.72, 128,570.22 and 30,270.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,674.72 : 128,570.22 = 30,270.72 : x
2. Step 2: Convert to fraction form
   85,674.72/128,570.22 = 30,270.72/x
3. Step 3: Cross multiply
   85,674.72x = 128,570.22 × 30,270.72
4. Step 4: Simplify right side
   85,674.72x = 3,891,913,129.96
5. Step 5: Solve for x
   x = 3,891,913,129.96/85,674.72
6. Step 6: Final answer
   x = 45,426.62