Finding the Fourth Proportional to 28,574.10, 42,856.29 and 7,792.74

Step by Step Solution

1. Step 1: Write the proportion equation
   28,574.10 : 42,856.29 = 7,792.74 : x
2. Step 2: Convert to fraction form
   28,574.10/42,856.29 = 7,792.74/x
3. Step 3: Cross multiply
   28,574.10x = 42,856.29 × 7,792.74
4. Step 4: Simplify right side
   28,574.10x = 333,967,925.33
5. Step 5: Solve for x
   x = 333,967,925.33/28,574.10
6. Step 6: Final answer
   x = 11,687.78