Finding the Fourth Proportional to 28,592.17, 42,886.20 and 8,870.22

Step by Step Solution

1. Step 1: Write the proportion equation
   28,592.17 : 42,886.20 = 8,870.22 : x
2. Step 2: Convert to fraction form
   28,592.17/42,886.20 = 8,870.22/x
3. Step 3: Cross multiply
   28,592.17x = 42,886.20 × 8,870.22
4. Step 4: Simplify right side
   28,592.17x = 380,410,028.96
5. Step 5: Solve for x
   x = 380,410,028.96/28,592.17
6. Step 6: Final answer
   x = 13,304.69