Finding the Fourth Proportional to 22,448.65, 30,978.56 and 12,376.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,448.65 : 30,978.56 = 12,376.86 : x
2. Step 2: Convert to fraction form
   22,448.65/30,978.56 = 12,376.86/x
3. Step 3: Cross multiply
   22,448.65x = 30,978.56 × 12,376.86
4. Step 4: Simplify right side
   22,448.65x = 383,417,300.12
5. Step 5: Solve for x
   x = 383,417,300.12/22,448.65
6. Step 6: Final answer
   x = 17,079.75