Finding the Fourth Proportional to 17,978.31, 26,957.70 and 8,106.03

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.31 : 26,957.70 = 8,106.03 : x
2. Step 2: Convert to fraction form
   17,978.31/26,957.70 = 8,106.03/x
3. Step 3: Cross multiply
   17,978.31x = 26,957.70 × 8,106.03
4. Step 4: Simplify right side
   17,978.31x = 218,519,924.93
5. Step 5: Solve for x
   x = 218,519,924.93/17,978.31
6. Step 6: Final answer
   x = 12,154.64