Finding the Fourth Proportional to 16,298.75, 22,493.70 and 9,128.55

Step by Step Solution

1. Step 1: Write the proportion equation
   16,298.75 : 22,493.70 = 9,128.55 : x
2. Step 2: Convert to fraction form
   16,298.75/22,493.70 = 9,128.55/x
3. Step 3: Cross multiply
   16,298.75x = 22,493.70 × 9,128.55
4. Step 4: Simplify right side
   16,298.75x = 205,334,842.31
5. Step 5: Solve for x
   x = 205,334,842.31/16,298.75
6. Step 6: Final answer
   x = 12,598.20