Finding the Fourth Proportional to 30,715.44, 42,462.72 and 30,434.64

Step by Step Solution

1. Step 1: Write the proportion equation
   30,715.44 : 42,462.72 = 30,434.64 : x
2. Step 2: Convert to fraction form
   30,715.44/42,462.72 = 30,434.64/x
3. Step 3: Cross multiply
   30,715.44x = 42,462.72 × 30,434.64
4. Step 4: Simplify right side
   30,715.44x = 1,292,337,596.62
5. Step 5: Solve for x
   x = 1,292,337,596.62/30,715.44
6. Step 6: Final answer
   x = 42,074.53