Finding the Fourth Proportional to 21,499,002.72, 29,668,654.08 and 11,709,485.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499,002.72 : 29,668,654.08 = 11,709,485.28 : x
2. Step 2: Convert to fraction form
   21,499,002.72/29,668,654.08 = 11,709,485.28/x
3. Step 3: Cross multiply
   21,499,002.72x = 29,668,654.08 × 11,709,485.28
4. Step 4: Simplify right side
   21,499,002.72x = 347,404,668,227,171.88
5. Step 5: Solve for x
   x = 347,404,668,227,171.88/21,499,002.72
6. Step 6: Final answer
   x = 16,159,106.20