Finding the Fourth Proportional to 21,649,818.33, 29,876,747.59 and 12,947,990.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,649,818.33 : 29,876,747.59 = 12,947,990.76 : x
2. Step 2: Convert to fraction form
   21,649,818.33/29,876,747.59 = 12,947,990.76/x
3. Step 3: Cross multiply
   21,649,818.33x = 29,876,747.59 × 12,947,990.76
4. Step 4: Simplify right side
   21,649,818.33x = 386,843,851,734,172.25
5. Step 5: Solve for x
   x = 386,843,851,734,172.25/21,649,818.33
6. Step 6: Final answer
   x = 17,868,226.23