Finding the Fourth Proportional to 28,588.56, 42,883.56 and 7,812.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,588.56 : 42,883.56 = 7,812.24 : x
2. Step 2: Convert to fraction form
   28,588.56/42,883.56 = 7,812.24/x
3. Step 3: Cross multiply
   28,588.56x = 42,883.56 × 7,812.24
4. Step 4: Simplify right side
   28,588.56x = 335,016,662.77
5. Step 5: Solve for x
   x = 335,016,662.77/28,588.56
6. Step 6: Final answer
   x = 11,718.56