Finding the Fourth Proportional to 8,139,398.24, 12,199,809.72 and 3,278,592.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139,398.24 : 12,199,809.72 = 3,278,592.20 : x
2. Step 2: Convert to fraction form
   8,139,398.24/12,199,809.72 = 3,278,592.20/x
3. Step 3: Cross multiply
   8,139,398.24x = 12,199,809.72 × 3,278,592.20
4. Step 4: Simplify right side
   8,139,398.24x = 39,998,200,989,476.19
5. Step 5: Solve for x
   x = 39,998,200,989,476.19/8,139,398.24
6. Step 6: Final answer
   x = 4,914,147.19