Finding the Fourth Proportional to 12,645,978.36, 18,968,981.22 and 5,919,116.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,645,978.36 : 18,968,981.22 = 5,919,116.28 : x
2. Step 2: Convert to fraction form
   12,645,978.36/18,968,981.22 = 5,919,116.28/x
3. Step 3: Cross multiply
   12,645,978.36x = 18,968,981.22 × 5,919,116.28
4. Step 4: Simplify right side
   12,645,978.36x = 112,279,605,554,316.27
5. Step 5: Solve for x
   x = 112,279,605,554,316.27/12,645,978.36
6. Step 6: Final answer
   x = 8,878,680.82