Finding the Fourth Proportional to 28,118.60, 42,164.00 and 9,392.21

Step by Step Solution

1. Step 1: Write the proportion equation
   28,118.60 : 42,164.00 = 9,392.21 : x
2. Step 2: Convert to fraction form
   28,118.60/42,164.00 = 9,392.21/x
3. Step 3: Cross multiply
   28,118.60x = 42,164.00 × 9,392.21
4. Step 4: Simplify right side
   28,118.60x = 396,013,200.89
5. Step 5: Solve for x
   x = 396,013,200.89/28,118.60
6. Step 6: Final answer
   x = 14,083.67