Finding the Fourth Proportional to 20,569,820.29, 28,389,243.83 and 12,731,846.58

Step by Step Solution

1. Step 1: Write the proportion equation
   20,569,820.29 : 28,389,243.83 = 12,731,846.58 : x
2. Step 2: Convert to fraction form
   20,569,820.29/28,389,243.83 = 12,731,846.58/x
3. Step 3: Cross multiply
   20,569,820.29x = 28,389,243.83 × 12,731,846.58
4. Step 4: Simplify right side
   20,569,820.29x = 361,447,496,902,112.38
5. Step 5: Solve for x
   x = 361,447,496,902,112.38/20,569,820.29
6. Step 6: Final answer
   x = 17,571,738.20