Finding the Fourth Proportional to 8,139,013.76, 12,209,639.81 and 3,021,008.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,139,013.76 : 12,209,639.81 = 3,021,008.78 : x
2. Step 2: Convert to fraction form
   8,139,013.76/12,209,639.81 = 3,021,008.78/x
3. Step 3: Cross multiply
   8,139,013.76x = 12,209,639.81 × 3,021,008.78
4. Step 4: Simplify right side
   8,139,013.76x = 36,885,429,066,647.53
5. Step 5: Solve for x
   x = 36,885,429,066,647.53/8,139,013.76
6. Step 6: Final answer
   x = 4,531,928.58