Finding the Fourth Proportional to 21,815,776.98, 30,105,695.25 and 12,653,646.66

Step by Step Solution

1. Step 1: Write the proportion equation
   21,815,776.98 : 30,105,695.25 = 12,653,646.66 : x
2. Step 2: Convert to fraction form
   21,815,776.98/30,105,695.25 = 12,653,646.66/x
3. Step 3: Cross multiply
   21,815,776.98x = 30,105,695.25 × 12,653,646.66
4. Step 4: Simplify right side
   21,815,776.98x = 380,946,830,147,140.38
5. Step 5: Solve for x
   x = 380,946,830,147,140.38/21,815,776.98
6. Step 6: Final answer
   x = 17,461,987.74