Finding the Fourth Proportional to 12,338.86, 18,507.15 and 3,455.00

Step by Step Solution

1. Step 1: Write the proportion equation
   12,338.86 : 18,507.15 = 3,455.00 : x
2. Step 2: Convert to fraction form
   12,338.86/18,507.15 = 3,455.00/x
3. Step 3: Cross multiply
   12,338.86x = 18,507.15 × 3,455.00
4. Step 4: Simplify right side
   12,338.86x = 63,942,120.89
5. Step 5: Solve for x
   x = 63,942,120.89/12,338.86
6. Step 6: Final answer
   x = 5,182.17