Finding the Fourth Proportional to 22,978.78, 34,485.45 and 18,416.86

Step by Step Solution

1. Step 1: Write the proportion equation
   22,978.78 : 34,485.45 = 18,416.86 : x
2. Step 2: Convert to fraction form
   22,978.78/34,485.45 = 18,416.86/x
3. Step 3: Cross multiply
   22,978.78x = 34,485.45 × 18,416.86
4. Step 4: Simplify right side
   22,978.78x = 635,113,704.69
5. Step 5: Solve for x
   x = 635,113,704.69/22,978.78
6. Step 6: Final answer
   x = 27,639.14