Finding the Fourth Proportional to 51,689.43, 71,322.88 and 30,472.79

Step by Step Solution

1. Step 1: Write the proportion equation
   51,689.43 : 71,322.88 = 30,472.79 : x
2. Step 2: Convert to fraction form
   51,689.43/71,322.88 = 30,472.79/x
3. Step 3: Cross multiply
   51,689.43x = 71,322.88 × 30,472.79
4. Step 4: Simplify right side
   51,689.43x = 2,173,406,992.07
5. Step 5: Solve for x
   x = 2,173,406,992.07/51,689.43
6. Step 6: Final answer
   x = 42,047.42