Finding the Fourth Proportional to 22,457.46, 30,992.71 and 12,900.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,457.46 : 30,992.71 = 12,900.34 : x
2. Step 2: Convert to fraction form
   22,457.46/30,992.71 = 12,900.34/x
3. Step 3: Cross multiply
   22,457.46x = 30,992.71 × 12,900.34
4. Step 4: Simplify right side
   22,457.46x = 399,816,341.56
5. Step 5: Solve for x
   x = 399,816,341.56/22,457.46
6. Step 6: Final answer
   x = 17,803.28