Finding the Fourth Proportional to 28,581.50, 42,875.22 and 7,805

Step by Step Solution

1. Step 1: Write the proportion equation
   28,581.50 : 42,875.22 = 7,805 : x
2. Step 2: Convert to fraction form
   28,581.50/42,875.22 = 7,805/x
3. Step 3: Cross multiply
   28,581.50x = 42,875.22 × 7,805
4. Step 4: Simplify right side
   28,581.50x = 334,641,092.10
5. Step 5: Solve for x
   x = 334,641,092.10/28,581.50
6. Step 6: Final answer
   x = 11,708.31