Finding the Fourth Proportional to 12,112.78, 16,715.40 and 7,397.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.78 : 16,715.40 = 7,397.06 : x
2. Step 2: Convert to fraction form
   12,112.78/16,715.40 = 7,397.06/x
3. Step 3: Cross multiply
   12,112.78x = 16,715.40 × 7,397.06
4. Step 4: Simplify right side
   12,112.78x = 123,644,816.72
5. Step 5: Solve for x
   x = 123,644,816.72/12,112.78
6. Step 6: Final answer
   x = 10,207.80