Finding the Fourth Proportional to 28,045.31, 42,068.57 and 8,325.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,045.31 : 42,068.57 = 8,325.25 : x
2. Step 2: Convert to fraction form
   28,045.31/42,068.57 = 8,325.25/x
3. Step 3: Cross multiply
   28,045.31x = 42,068.57 × 8,325.25
4. Step 4: Simplify right side
   28,045.31x = 350,231,215.59
5. Step 5: Solve for x
   x = 350,231,215.59/28,045.31
6. Step 6: Final answer
   x = 12,488.05