Finding the Fourth Proportional to 21,930,439.29, 30,267,173.40 and 12,636,229.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930,439.29 : 30,267,173.40 = 12,636,229.98 : x
2. Step 2: Convert to fraction form
   21,930,439.29/30,267,173.40 = 12,636,229.98/x
3. Step 3: Cross multiply
   21,930,439.29x = 30,267,173.40 × 12,636,229.98
4. Step 4: Simplify right side
   21,930,439.29x = 382,462,963,926,938.50
5. Step 5: Solve for x
   x = 382,462,963,926,938.50/21,930,439.29
6. Step 6: Final answer
   x = 17,439,822.29