Finding the Fourth Proportional to 21,709,992.23, 29,960,766.56 and 13,007,978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,709,992.23 : 29,960,766.56 = 13,007,978.02 : x
2. Step 2: Convert to fraction form
   21,709,992.23/29,960,766.56 = 13,007,978.02/x
3. Step 3: Cross multiply
   21,709,992.23x = 29,960,766.56 × 13,007,978.02
4. Step 4: Simplify right side
   21,709,992.23x = 389,728,992,874,831
5. Step 5: Solve for x
   x = 389,728,992,874,831/21,709,992.23
6. Step 6: Final answer
   x = 17,951,595.23