Finding the Fourth Proportional to 43,048.96, 64,589.76 and 20,860.72

Step by Step Solution

1. Step 1: Write the proportion equation
   43,048.96 : 64,589.76 = 20,860.72 : x
2. Step 2: Convert to fraction form
   43,048.96/64,589.76 = 20,860.72/x
3. Step 3: Cross multiply
   43,048.96x = 64,589.76 × 20,860.72
4. Step 4: Simplify right side
   43,048.96x = 1,347,388,898.23
5. Step 5: Solve for x
   x = 1,347,388,898.23/43,048.96
6. Step 6: Final answer
   x = 31,298.99