Finding the Fourth Proportional to 12,453.42, 18,670.35 and 8,494.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,453.42 : 18,670.35 = 8,494.86 : x
2. Step 2: Convert to fraction form
   12,453.42/18,670.35 = 8,494.86/x
3. Step 3: Cross multiply
   12,453.42x = 18,670.35 × 8,494.86
4. Step 4: Simplify right side
   12,453.42x = 158,602,009.40
5. Step 5: Solve for x
   x = 158,602,009.40/12,453.42
6. Step 6: Final answer
   x = 12,735.62