Finding the Fourth Proportional to 284,290.56, 426,434.12 and 71,057.40

Step by Step Solution

1. Step 1: Write the proportion equation
   284,290.56 : 426,434.12 = 71,057.40 : x
2. Step 2: Convert to fraction form
   284,290.56/426,434.12 = 71,057.40/x
3. Step 3: Cross multiply
   284,290.56x = 426,434.12 × 71,057.40
4. Step 4: Simplify right side
   284,290.56x = 30,301,300,549.23
5. Step 5: Solve for x
   x = 30,301,300,549.23/284,290.56
6. Step 6: Final answer
   x = 106,585.67