Finding the Fourth Proportional to 28,118.34, 42,178.32 and 8,397.27

Step by Step Solution

1. Step 1: Write the proportion equation
   28,118.34 : 42,178.32 = 8,397.27 : x
2. Step 2: Convert to fraction form
   28,118.34/42,178.32 = 8,397.27/x
3. Step 3: Cross multiply
   28,118.34x = 42,178.32 × 8,397.27
4. Step 4: Simplify right side
   28,118.34x = 354,182,741.19
5. Step 5: Solve for x
   x = 354,182,741.19/28,118.34
6. Step 6: Final answer
   x = 12,596.15