Finding the Fourth Proportional to 43,308.18, 64,956.87 and 12,145.86

Step by Step Solution

1. Step 1: Write the proportion equation
   43,308.18 : 64,956.87 = 12,145.86 : x
2. Step 2: Convert to fraction form
   43,308.18/64,956.87 = 12,145.86/x
3. Step 3: Cross multiply
   43,308.18x = 64,956.87 × 12,145.86
4. Step 4: Simplify right side
   43,308.18x = 788,957,049.06
5. Step 5: Solve for x
   x = 788,957,049.06/43,308.18
6. Step 6: Final answer
   x = 18,217.28