Finding the Fourth Proportional to 13,644,978.39, 18,831,721.59 and 7,766,042.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,644,978.39 : 18,831,721.59 = 7,766,042.13 : x
2. Step 2: Convert to fraction form
   13,644,978.39/18,831,721.59 = 7,766,042.13/x
3. Step 3: Cross multiply
   13,644,978.39x = 18,831,721.59 × 7,766,042.13
4. Step 4: Simplify right side
   13,644,978.39x = 146,247,943,248,370.59
5. Step 5: Solve for x
   x = 146,247,943,248,370.59/13,644,978.39
6. Step 6: Final answer
   x = 10,718,078.04