Finding the Fourth Proportional to 12,785.88, 19,087.35 and 12,218.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,785.88 : 19,087.35 = 12,218.52 : x
2. Step 2: Convert to fraction form
   12,785.88/19,087.35 = 12,218.52/x
3. Step 3: Cross multiply
   12,785.88x = 19,087.35 × 12,218.52
4. Step 4: Simplify right side
   12,785.88x = 233,219,167.72
5. Step 5: Solve for x
   x = 233,219,167.72/12,785.88
6. Step 6: Final answer
   x = 18,240.37