Finding the Fourth Proportional to 22,457.50, 30,990.94 and 12,386.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,457.50 : 30,990.94 = 12,386.88 : x
2. Step 2: Convert to fraction form
   22,457.50/30,990.94 = 12,386.88/x
3. Step 3: Cross multiply
   22,457.50x = 30,990.94 × 12,386.88
4. Step 4: Simplify right side
   22,457.50x = 383,881,054.87
5. Step 5: Solve for x
   x = 383,881,054.87/22,457.50
6. Step 6: Final answer
   x = 17,093.67