Finding the Fourth Proportional to 28,267.82, 42,407.89 and 8,545.87

Step by Step Solution

1. Step 1: Write the proportion equation
   28,267.82 : 42,407.89 = 8,545.87 : x
2. Step 2: Convert to fraction form
   28,267.82/42,407.89 = 8,545.87/x
3. Step 3: Cross multiply
   28,267.82x = 42,407.89 × 8,545.87
4. Step 4: Simplify right side
   28,267.82x = 362,412,314.91
5. Step 5: Solve for x
   x = 362,412,314.91/28,267.82
6. Step 6: Final answer
   x = 12,820.67