Finding the Fourth Proportional to 28,381.02, 42,577.71 and 8,659.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,381.02 : 42,577.71 = 8,659.05 : x
2. Step 2: Convert to fraction form
   28,381.02/42,577.71 = 8,659.05/x
3. Step 3: Cross multiply
   28,381.02x = 42,577.71 × 8,659.05
4. Step 4: Simplify right side
   28,381.02x = 368,682,519.78
5. Step 5: Solve for x
   x = 368,682,519.78/28,381.02
6. Step 6: Final answer
   x = 12,990.46