Finding the Fourth Proportional to 12,427,635.94, 18,642,118.21 and 3,908,636.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427,635.94 : 18,642,118.21 = 3,908,636.71 : x
2. Step 2: Convert to fraction form
   12,427,635.94/18,642,118.21 = 3,908,636.71/x
3. Step 3: Cross multiply
   12,427,635.94x = 18,642,118.21 × 3,908,636.71
4. Step 4: Simplify right side
   12,427,635.94x = 72,865,267,531,388.59
5. Step 5: Solve for x
   x = 72,865,267,531,388.59/12,427,635.94
6. Step 6: Final answer
   x = 5,863,163.99