Finding the Fourth Proportional to 28,092.78, 42,134.82 and 8,368.20

Step by Step Solution

1. Step 1: Write the proportion equation
   28,092.78 : 42,134.82 = 8,368.20 : x
2. Step 2: Convert to fraction form
   28,092.78/42,134.82 = 8,368.20/x
3. Step 3: Cross multiply
   28,092.78x = 42,134.82 × 8,368.20
4. Step 4: Simplify right side
   28,092.78x = 352,592,600.72
5. Step 5: Solve for x
   x = 352,592,600.72/28,092.78
6. Step 6: Final answer
   x = 12,551.00