Finding the Fourth Proportional to 13,321,642.18, 18,384,311.98 and 8,164,007.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321,642.18 : 18,384,311.98 = 8,164,007.68 : x
2. Step 2: Convert to fraction form
   13,321,642.18/18,384,311.98 = 8,164,007.68/x
3. Step 3: Cross multiply
   13,321,642.18x = 18,384,311.98 × 8,164,007.68
4. Step 4: Simplify right side
   13,321,642.18x = 150,089,664,196,236
5. Step 5: Solve for x
   x = 150,089,664,196,236/13,321,642.18
6. Step 6: Final answer
   x = 11,266,603.78