Finding the Fourth Proportional to 12,928.50, 17,849.70 and 10,090.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,928.50 : 17,849.70 = 10,090.98 : x
2. Step 2: Convert to fraction form
   12,928.50/17,849.70 = 10,090.98/x
3. Step 3: Cross multiply
   12,928.50x = 17,849.70 × 10,090.98
4. Step 4: Simplify right side
   12,928.50x = 180,120,965.71
5. Step 5: Solve for x
   x = 180,120,965.71/12,928.50
6. Step 6: Final answer
   x = 13,932.09