Finding the Fourth Proportional to 52,680.72, 72,698.92 and 30,020.64

Step by Step Solution

1. Step 1: Write the proportion equation
   52,680.72 : 72,698.92 = 30,020.64 : x
2. Step 2: Convert to fraction form
   52,680.72/72,698.92 = 30,020.64/x
3. Step 3: Cross multiply
   52,680.72x = 72,698.92 × 30,020.64
4. Step 4: Simplify right side
   52,680.72x = 2,182,468,105.71
5. Step 5: Solve for x
   x = 2,182,468,105.71/52,680.72
6. Step 6: Final answer
   x = 41,428.21