Finding the Fourth Proportional to 22,391, 30,899.76 and 12,319.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,391 : 30,899.76 = 12,319.16 : x
2. Step 2: Convert to fraction form
   22,391/30,899.76 = 12,319.16/x
3. Step 3: Cross multiply
   22,391x = 30,899.76 × 12,319.16
4. Step 4: Simplify right side
   22,391x = 380,659,087.40
5. Step 5: Solve for x
   x = 380,659,087.40/22,391
6. Step 6: Final answer
   x = 17,000.54