Finding the Fourth Proportional to 22,308, 30,785.40 and 12,372

Step by Step Solution

1. Step 1: Write the proportion equation
   22,308 : 30,785.40 = 12,372 : x
2. Step 2: Convert to fraction form
   22,308/30,785.40 = 12,372/x
3. Step 3: Cross multiply
   22,308x = 30,785.40 × 12,372
4. Step 4: Simplify right side
   22,308x = 380,876,968.80
5. Step 5: Solve for x
   x = 380,876,968.80/22,308
6. Step 6: Final answer
   x = 17,073.56