Finding the Fourth Proportional to 20,434,946.72, 28,214,633.49 and 13,111,646

Step by Step Solution

1. Step 1: Write the proportion equation
   20,434,946.72 : 28,214,633.49 = 13,111,646 : x
2. Step 2: Convert to fraction form
   20,434,946.72/28,214,633.49 = 13,111,646/x
3. Step 3: Cross multiply
   20,434,946.72x = 28,214,633.49 × 13,111,646
4. Step 4: Simplify right side
   20,434,946.72x = 369,940,286,340,624.50
5. Step 5: Solve for x
   x = 369,940,286,340,624.50/20,434,946.72
6. Step 6: Final answer
   x = 18,103,315.43