Finding the Fourth Proportional to 13,084.94, 18,057 and 7,779.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,084.94 : 18,057 = 7,779.98 : x
2. Step 2: Convert to fraction form
   13,084.94/18,057 = 7,779.98/x
3. Step 3: Cross multiply
   13,084.94x = 18,057 × 7,779.98
4. Step 4: Simplify right side
   13,084.94x = 140,483,098.86
5. Step 5: Solve for x
   x = 140,483,098.86/13,084.94
6. Step 6: Final answer
   x = 10,736.24