Finding the Fourth Proportional to 22,390.52, 30,899.06 and 12,319.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,390.52 : 30,899.06 = 12,319.60 : x
2. Step 2: Convert to fraction form
   22,390.52/30,899.06 = 12,319.60/x
3. Step 3: Cross multiply
   22,390.52x = 30,899.06 × 12,319.60
4. Step 4: Simplify right side
   22,390.52x = 380,664,059.58
5. Step 5: Solve for x
   x = 380,664,059.58/22,390.52
6. Step 6: Final answer
   x = 17,001.13