Finding the Fourth Proportional to 22,216.46, 30,657.54 and 12,656.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.46 : 30,657.54 = 12,656.30 : x
2. Step 2: Convert to fraction form
   22,216.46/30,657.54 = 12,656.30/x
3. Step 3: Cross multiply
   22,216.46x = 30,657.54 × 12,656.30
4. Step 4: Simplify right side
   22,216.46x = 388,011,023.50
5. Step 5: Solve for x
   x = 388,011,023.50/22,216.46
6. Step 6: Final answer
   x = 17,465.02