Finding the Fourth Proportional to 22,449.12, 30,980.72 and 12,378.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,449.12 : 30,980.72 = 12,378.76 : x
2. Step 2: Convert to fraction form
   22,449.12/30,980.72 = 12,378.76/x
3. Step 3: Cross multiply
   22,449.12x = 30,980.72 × 12,378.76
4. Step 4: Simplify right side
   22,449.12x = 383,502,897.51
5. Step 5: Solve for x
   x = 383,502,897.51/22,449.12
6. Step 6: Final answer
   x = 17,083.20