Finding the Fourth Proportional to 28,041.86, 42,066.98 and 8,318.09

Step by Step Solution

1. Step 1: Write the proportion equation
   28,041.86 : 42,066.98 = 8,318.09 : x
2. Step 2: Convert to fraction form
   28,041.86/42,066.98 = 8,318.09/x
3. Step 3: Cross multiply
   28,041.86x = 42,066.98 × 8,318.09
4. Step 4: Simplify right side
   28,041.86x = 349,916,925.67
5. Step 5: Solve for x
   x = 349,916,925.67/28,041.86
6. Step 6: Final answer
   x = 12,478.38