Finding the Fourth Proportional to 16,572, 22,869.72 and 9,120

Step by Step Solution

1. Step 1: Write the proportion equation
   16,572 : 22,869.72 = 9,120 : x
2. Step 2: Convert to fraction form
   16,572/22,869.72 = 9,120/x
3. Step 3: Cross multiply
   16,572x = 22,869.72 × 9,120
4. Step 4: Simplify right side
   16,572x = 208,571,846.40
5. Step 5: Solve for x
   x = 208,571,846.40/16,572
6. Step 6: Final answer
   x = 12,585.80