Finding the Fourth Proportional to 16,128.83, 22,254.15 and 9,054.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.83 : 22,254.15 = 9,054.78 : x
2. Step 2: Convert to fraction form
   16,128.83/22,254.15 = 9,054.78/x
3. Step 3: Cross multiply
   16,128.83x = 22,254.15 × 9,054.78
4. Step 4: Simplify right side
   16,128.83x = 201,506,432.34
5. Step 5: Solve for x
   x = 201,506,432.34/16,128.83
6. Step 6: Final answer
   x = 12,493.56