Finding the Fourth Proportional to 21,480,788.31, 29,642,611.59 and 12,188,158.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,480,788.31 : 29,642,611.59 = 12,188,158.38 : x
2. Step 2: Convert to fraction form
   21,480,788.31/29,642,611.59 = 12,188,158.38/x
3. Step 3: Cross multiply
   21,480,788.31x = 29,642,611.59 × 12,188,158.38
4. Step 4: Simplify right side
   21,480,788.31x = 361,288,844,855,743.62
5. Step 5: Solve for x
   x = 361,288,844,855,743.62/21,480,788.31
6. Step 6: Final answer
   x = 16,819,161.36