Finding the Fourth Proportional to 20,967,215.43, 31,440,298.71 and 12,216,326.54

Step by Step Solution

1. Step 1: Write the proportion equation
   20,967,215.43 : 31,440,298.71 = 12,216,326.54 : x
2. Step 2: Convert to fraction form
   20,967,215.43/31,440,298.71 = 12,216,326.54/x
3. Step 3: Cross multiply
   20,967,215.43x = 31,440,298.71 × 12,216,326.54
4. Step 4: Simplify right side
   20,967,215.43x = 384,084,955,445,110.50
5. Step 5: Solve for x
   x = 384,084,955,445,110.50/20,967,215.43
6. Step 6: Final answer
   x = 18,318,357.86