Finding the Fourth Proportional to 479,682.72, 719,398.72 and 142,632.60

Step by Step Solution

1. Step 1: Write the proportion equation
   479,682.72 : 719,398.72 = 142,632.60 : x
2. Step 2: Convert to fraction form
   479,682.72/719,398.72 = 142,632.60/x
3. Step 3: Cross multiply
   479,682.72x = 719,398.72 × 142,632.60
4. Step 4: Simplify right side
   479,682.72x = 102,609,709,870.27
5. Step 5: Solve for x
   x = 102,609,709,870.27/479,682.72
6. Step 6: Final answer
   x = 213,911.62