Finding the Fourth Proportional to 20,771,111.30, 31,162,426.05 and 8,646,286.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,771,111.30 : 31,162,426.05 = 8,646,286.10 : x
2. Step 2: Convert to fraction form
   20,771,111.30/31,162,426.05 = 8,646,286.10/x
3. Step 3: Cross multiply
   20,771,111.30x = 31,162,426.05 × 8,646,286.10
4. Step 4: Simplify right side
   20,771,111.30x = 269,439,251,198,392.91
5. Step 5: Solve for x
   x = 269,439,251,198,392.91/20,771,111.30
6. Step 6: Final answer
   x = 12,971,826.46